Code clean up, add preconditions, and correct Javadocs.

src/main/java/com/sk89q/worldedit/blocks/BaseBlock.java

@@ -53,6 +53,7 @@ import java.util.Collection;
  * as a "wildcard" block value, even though a {@link Mask} would be
  * more appropriate.</p>
  */
+@SuppressWarnings("deprecation")
 public class BaseBlock extends Block implements TileEntityBlock {
 
     /**
@@ -251,9 +252,8 @@ public class BaseBlock extends Block implements TileEntityBlock {
         return nbtData;
     }
 
-    @Nullable
     @Override
-    public void setNbtData(CompoundTag nbtData) {
+    public void setNbtData(@Nullable CompoundTag nbtData) {
         this.nbtData = nbtData;
     }
 
@@ -359,11 +359,9 @@ public class BaseBlock extends Block implements TileEntityBlock {
         }
 
         final BaseBlock otherBlock = (BaseBlock) o;
-        if (getType() != otherBlock.getType()) {
-            return false;
-        }
 
-        return getData() == otherBlock.getData();
+        return getType() == otherBlock.getType() && getData() == otherBlock.getData();
+
     }
 
     /**

src/main/java/com/sk89q/worldedit/blocks/BlockID.java

@@ -21,8 +21,6 @@ package com.sk89q.worldedit.blocks;
 
 /**
  * List of block IDs.
- *
- * @author sk89q
  */
 public final class BlockID {
     public static final int AIR = 0;

src/main/java/com/sk89q/worldedit/blocks/BlockMaterial.java

@@ -24,48 +24,160 @@ package com.sk89q.worldedit.blocks;
  */
 public interface BlockMaterial {
 
+    /**
+     * Get whether this block is rendered like a normal block.
+     *
+     * @return the value of the test
+     */
     boolean isRenderedAsNormalBlock();
 
+    /**
+     * Get whether this block is a full sized cube.
+     *
+     * @return the value of the test
+     */
     boolean isFullCube();
 
+    /**
+     * Get whether this block is opaque.
+     *
+     * @return the value of the test
+     */
     boolean isOpaque();
 
+    /**
+     * Get whether this block emits a Redstone signal.
+     *
+     * @return the value of the test
+     */
     boolean isPowerSource();
 
+    /**
+     * Get whether this block is a liquid.
+     *
+     * @return the value of the test
+     */
     boolean isLiquid();
 
+    /**
+     * Get whether this block is a solid.
+     *
+     * @return the value of the test
+     */
     boolean isSolid();
 
+    /**
+     * Get the hardness factor for this block.
+     *
+     * @return the hardness factor
+     */
     float getHardness();
 
+    /**
+     * Get the resistance factor for this block.
+     *
+     * @return the resistance factor
+     */
     float getResistance();
 
+    /**
+     * Get the slipperiness factor for this block.
+     *
+     * @return the slipperiness factor
+     */
     float getSlipperiness();
 
+    /**
+     * Get whether this block blocks grass from growing.
+     *
+     * @return whether this block blocks grass
+     */
     boolean isGrassBlocking();
 
+    /**
+     * Get the ambient occlusion light value.
+     *
+     * @return the ambient occlusion light value
+     */
     float getAmbientOcclusionLightValue();
 
+    /**
+     * Get the opacity of this block for light to pass through.
+     *
+     * @return the opacity
+     */
     int getLightOpacity();
 
+    /**
+     * Get the light value for this block.
+     *
+     * @return the light value
+     */
     int getLightValue();
 
+    /**
+     * Get whether this block breaks when it is pushed by a piston.
+     *
+     * @return true if the block breaks
+     */
     boolean isFragileWhenPushed();
 
+    /**
+     * Get whether this block can be pushed by a piston.
+     *
+     * @return true if the block cannot be pushed
+     */
     boolean isUnpushable();
 
+    /**
+     * Get whether this block can be used in adventure mode.
+     *
+     * @return true if the block can be used in adventure mode
+     */
     boolean isAdventureModeExempt();
 
+    /**
+     * Get whether this block is ticked randomly.
+     *
+     * @return true if this block is ticked randomly
+     */
     boolean isTicksRandomly();
 
+    /**
+     * Gets whether this block uses a neighbor's light value.
+     *
+     * @return true if this block does
+     */
     boolean isUsingNeighborLight();
 
+    /**
+     * Get whether this block prevents movement.
+     *
+     * @return true if this block blocks movement
+     */
     boolean isMovementBlocker();
 
+    /**
+     * Get whether this block will burn.
+     *
+     * @return true if this block will burn
+     */
     boolean isBurnable();
 
+    /**
+     * Get whether this block needs to be broken by a tool for maximum
+     * speed.
+     *
+     * @return true if a tool is required
+     */
     boolean isToolRequired();
 
+    /**
+     * Get whether this block is replaced when a block is placed over it
+     * (for example, tall grass).
+     *
+     * @return true if the block is replaced
+     */
     boolean isReplacedDuringPlacement();
 
 }

src/main/java/com/sk89q/worldedit/entity/BaseEntity.java

@@ -22,10 +22,22 @@ package com.sk89q.worldedit.entity;
 import com.sk89q.jnbt.CompoundTag;
 import com.sk89q.worldedit.world.NbtValued;
 
+import javax.annotation.Nullable;
+
 import static com.google.common.base.Preconditions.checkNotNull;
 
 /**
- * A snapshot of an entity that can be reused and passed around.
+ * Represents a mutable "snapshot" of an entity.
+ *
+ * <p>An instance of this class contains all the information needed to
+ * accurately reproduce the entity, provided that the instance was
+ * made correctly. In some implementations, it may not be possible to get a
+ * snapshot of entities correctly, so, for example, the NBT data for an entity
+ * may be missing.</p>
+ *
+ * <p>This class identifies entities using its entity type string, although
+ * this is not very efficient as the types are currently not interned. This
+ * may be changed in the future.</p>
  */
 public class BaseEntity implements NbtValued {
 
@@ -68,14 +80,14 @@ public class BaseEntity implements NbtValued {
         return true;
     }
 
+    @Nullable
     @Override
     public CompoundTag getNbtData() {
         return nbtData;
     }
 
     @Override
-    public void setNbtData(CompoundTag nbtData) {
+    public void setNbtData(@Nullable CompoundTag nbtData) {
-        checkNotNull(nbtData);
         this.nbtData = nbtData;
     }
 

src/main/java/com/sk89q/worldedit/entity/Entity.java

@@ -28,19 +28,21 @@ import javax.annotation.Nullable;
 /**
  * A reference to an instance of an entity that exists in an {@link Extent}
  * and thus would have position and similar details.
- * </p>
+ *
- * This object cannot be directly cloned because it represents a particular
+ * <p>This object cannot be directly cloned because it represents a particular
  * instance of an entity, but a {@link BaseEntity} can be created from
- * this entity (or at least, it will be possible in the future), which
+ * this entity by calling {@link #getState()}.</p>
- * can then be used to spawn new instances of that particular entity
- * description.
  */
 public interface Entity extends Faceted {
 
     /**
      * Get a copy of the entity's state.
      *
-     * @return the entity's state or null if one cannot be gotten
+     * <p>In some cases, this method may return {@code null} if a snapshot
+     * of the entity can't be created. It may not be possible, for example,
+     * to get a snapshot of a player.</p>
+     *
+     * @return the entity's state or null if one cannot be created
      */
     @Nullable
     BaseEntity getState();

src/main/java/com/sk89q/worldedit/entity/Player.java

@@ -30,7 +30,7 @@ import com.sk89q.worldedit.extent.inventory.BlockBag;
 import com.sk89q.worldedit.world.World;
 
 /**
- * A player.
+ * Represents a player
  */
 public interface Player extends Entity, Actor {
 
@@ -192,12 +192,19 @@ public interface Player extends Entity, Actor {
      * Get the point of the block being looked at. May return null.
      * Will return the farthest away air block if useLastBlock is true and no other block is found.
      *
-     * @param range How far to checks for blocks
+     * @param range how far to checks for blocks
-     * @param useLastBlock Try to return the last valid air block found.
+     * @param useLastBlock try to return the last valid air block found
      * @return point
      */
     WorldVector getBlockTrace(int range, boolean useLastBlock);
 
+    /**
+     * Get the face that the player is looking at.
+     *
+     * @param range the range
+     * @param useLastBlock try to return the last valid air block found
+     * @return a face
+     */
     WorldVectorFace getBlockTraceFace(int range, boolean useLastBlock);
 
     /**
@@ -225,25 +232,31 @@ public interface Player extends Entity, Actor {
 
     /**
      * Get the actor's position.
-     * </p>
+     *
-     * If the actor has no permission, then return a dummy location.
+     * <p>If the actor has no permission, then a dummy location is returned.</p>
      *
      * @return the actor's position
+     * @deprecated use {@link #getLocation()}
      */
+    @Deprecated
     WorldVector getPosition();
 
     /**
-     * Get the player's view pitch.
+     * Get the player's view pitch in degrees.
      *
      * @return pitch
+     * @deprecated use {@link #getLocation()}
      */
+    @Deprecated
     double getPitch();
 
     /**
-     * Get the player's view yaw.
+     * Get the player's view yaw in degrees.
      *
      * @return yaw
+     * @deprecated use {@link #getLocation()}
      */
+    @Deprecated
     double getYaw();
 
     /**
@@ -257,16 +270,16 @@ public interface Player extends Entity, Actor {
     /**
      * Move the player.
      *
-     * @param pos Where to move them
+     * @param pos where to move them
-     * @param pitch The pitch (up/down) of the player's view
+     * @param pitch the pitch (up/down) of the player's view in degrees
-     * @param yaw The yaw (left/right) of the player's view
+     * @param yaw the yaw (left/right) of the player's view in degrees
      */
     void setPosition(Vector pos, float pitch, float yaw);
 
     /**
      * Move the player.
      *
-     * @param pos Where to move them
+     * @param pos where to move them
      */
     void setPosition(Vector pos);
 

src/main/java/com/sk89q/worldedit/event/extent/EditSessionEvent.java

@@ -34,17 +34,19 @@ import static com.sk89q.worldedit.EditSession.Stage;
 
 /**
  * Raised (several times) when a new {@link EditSession} is being instantiated.
- * </p>
+ *
- * Block loggers, as well as block set interceptors, can use this event to wrap
+ * <p></p>Block loggers, as well as block set interceptors, can use this event to wrap
  * the given {@link Extent} with their own, which would allow them to intercept
  * all changes made to the world. For example, the code below would wrap the
  * existing extent with a custom one, and the custom extent would receive
  * all method calls <strong>before</strong> the extent fetched from
- * {@link #getExtent()} would.
+ * {@link #getExtent()} would.</p>
+ *
  * <pre>
  * event.setExtent(new MyExtent(event.getExtent())
  * </pre>
- * This event is fired several times during the creation of a single
+ *
+ * <p></p>This event is fired several times during the creation of a single
  * {@link EditSession}, but {@link #getStage()} will differ each time.
  * The stage determines at which point {@link Extent}s added to this event
  * will be called. For example, if you inject an extent when the stage
@@ -55,7 +57,7 @@ import static com.sk89q.worldedit.EditSession.Stage;
  * custom {@link Extent} because that method bypasses history (and reorder).
  * It is thus recommended that loggers intercept at {@link Stage#BEFORE_CHANGE}
  * and block interceptors intercept at BOTH {@link Stage#BEFORE_CHANGE} and
- * {@link Stage#BEFORE_HISTORY}.
+ * {@link Stage#BEFORE_HISTORY}.</p>
  */
 public class EditSessionEvent extends Event {
 

src/main/java/com/sk89q/worldedit/extension/factory/BlockFactory.java

@@ -31,9 +31,9 @@ import java.util.Set;
 /**
  * A registry of known {@link BaseBlock}s. Provides methods to instantiate
  * new blocks from input.
- * </p>
+ *
- * Instances of this class can be taken from
+ * <p>Instances of this class can be taken from
- * {@link WorldEdit#getBlockFactory()}.
+ * {@link WorldEdit#getBlockFactory()}.</p>
  */
 public class BlockFactory extends AbstractFactory<BaseBlock> {
 

src/main/java/com/sk89q/worldedit/extension/factory/DefaultBlockParser.java

@@ -144,7 +144,7 @@ class DefaultBlockParser extends InputParser<BaseBlock> {
         if (parseDataValue) { // Block data not yet detected
             // Parse the block data (optional)
             try {
-                if (typeAndData.length > 1 && typeAndData[1].length() > 0) {
+                if (typeAndData.length > 1 && !typeAndData[1].isEmpty()) {
                     data = Integer.parseInt(typeAndData[1]);
                 }
 

src/main/java/com/sk89q/worldedit/extension/factory/DefaultMaskParser.java

@@ -63,7 +63,7 @@ class DefaultMaskParser extends InputParser<Mask> {
         List<Mask> masks = new ArrayList<Mask>();
 
         for (String component : input.split(" ")) {
-            if (component.length() == 0) {
+            if (component.isEmpty()) {
                 continue;
             }
 

src/main/java/com/sk89q/worldedit/extension/factory/MaskFactory.java

@@ -26,9 +26,9 @@ import com.sk89q.worldedit.internal.registry.AbstractFactory;
 /**
  * A registry of known {@link Mask}s. Provides methods to instantiate
  * new masks from input.
- * </p>
+ *
- * Instances of this class can be taken from
+ * <p>Instances of this class can be taken from
- * {@link WorldEdit#getMaskFactory()}.
+ * {@link WorldEdit#getMaskFactory()}.</p>
  */
 public final class MaskFactory extends AbstractFactory<Mask> {
 

src/main/java/com/sk89q/worldedit/extension/factory/PatternFactory.java

@@ -26,9 +26,9 @@ import com.sk89q.worldedit.internal.registry.AbstractFactory;
 /**
  * A registry of known {@link Pattern}s. Provides methods to instantiate
  * new patterns from input.
- * </p>
+ *
- * Instances of this class can be taken from
+ * <p>Instances of this class can be taken from
- * {@link WorldEdit#getPatternFactory()}.
+ * {@link WorldEdit#getPatternFactory()}.</p>
  */
 public final class PatternFactory extends AbstractFactory<Pattern> {
 

src/main/java/com/sk89q/worldedit/extension/input/ParserContext.java

@@ -30,8 +30,8 @@ import javax.annotation.Nullable;
 /**
  * Contains contextual information that may be useful when constructing
  * objects from a registry (such as {@link MaskFactory}).
- * </p>
+ *
- * By default, {@link #isRestricted()} will return true.
+ * <p>By default, {@link #isRestricted()} will return true.</p>
  */
 public class ParserContext {
 

src/main/java/com/sk89q/worldedit/extension/platform/CommandManager.java

@@ -59,8 +59,8 @@ import static com.google.common.base.Preconditions.checkNotNull;
 
 /**
  * Handles the registration and invocation of commands.
- * </p>
+ *
- * This class is primarily for internal usage.
+ * <p>This class is primarily for internal usage.</p>
  */
 public final class CommandManager {
 
@@ -206,7 +206,7 @@ public final class CommandManager {
         Request.reset();
 
         Actor actor = platformManager.createProxyActor(event.getActor());
-        String split[] = commandDetection(event.getArguments().split(" "));
+        String[] split = commandDetection(event.getArguments().split(" "));
 
         // No command found!
         if (!dispatcher.contains(split[0])) {

src/main/java/com/sk89q/worldedit/extension/platform/PlatformManager.java

@@ -44,8 +44,8 @@ import static com.google.common.base.Preconditions.checkNotNull;
 /**
  * Manages registered {@link Platform}s for WorldEdit. Platforms are
  * implementations of WorldEdit.
- * </p>
+ *
- * This class is thread-safe.
+ * <p>This class is thread-safe.</p>
  */
 public class PlatformManager {
 
@@ -99,9 +99,9 @@ public class PlatformManager {
 
     /**
      * Unregister a platform from WorldEdit.
-     * </p>
+     *
-     * If the platform has been chosen for any capabilities, then a new
+     * <p>If the platform has been chosen for any capabilities, then a new
-     * platform will be found.
+     * platform will be found.</p>
      *
      * @param platform the platform
      */
@@ -189,8 +189,8 @@ public class PlatformManager {
 
     /**
      * Get a list of loaded platforms.
-     * </p>
+     *
-     * The returned list is a copy of the original and is mutable.
+     * <p>The returned list is a copy of the original and is mutable.</p>
      *
      * @return a list of platforms
      */
@@ -252,9 +252,9 @@ public class PlatformManager {
 
     /**
      * Get the current configuration.
-     * </p>
+     *
-     * If no platform has been registered yet, then a default configuration
+     * <p>If no platform has been registered yet, then a default configuration
-     * will be returned.
+     * will be returned.</p>
      *
      * @return the configuration
      */
@@ -365,7 +365,6 @@ public class PlatformManager {
         // Create a proxy actor with a potentially different world for
         // making changes to the world
         Player player = createProxyActor(event.getPlayer());
-        World world = player.getWorld();
 
         switch (event.getInputType()) {
             case PRIMARY: {

src/main/java/com/sk89q/worldedit/extent/Extent.java

@@ -39,9 +39,9 @@ public interface Extent extends InputExtent, OutputExtent {
 
     /**
      * Get the minimum point in the extent.
-     * </p>
+     *
-     * If the extent is unbounded, then a large (negative) value may
+     * <p>If the extent is unbounded, then a large (negative) value may
-     * be returned.
+     * be returned.</p>
      *
      * @return the minimum point
      */
@@ -49,9 +49,9 @@ public interface Extent extends InputExtent, OutputExtent {
 
     /**
      * Get the maximum point in the extent.
-     * </p>
+     *
-     * If the extent is unbounded, then a large (positive) value may
+     * <p>If the extent is unbounded, then a large (positive) value may
-     * be returned.
+     * be returned.</p>
      *
      * @return the maximum point
      */
@@ -59,10 +59,10 @@ public interface Extent extends InputExtent, OutputExtent {
 
     /**
      * Get a list of all entities within the given region.
-     * </p>
+     *
-     * If the extent is not wholly loaded (i.e. a world being simulated in the
+     * <p>If the extent is not wholly loaded (i.e. a world being simulated in the
      * game will not have every chunk loaded), then this list may not be
-     * incomplete.
+     * incomplete.</p>
      *
      * @return a list of entities
      */
@@ -70,10 +70,10 @@ public interface Extent extends InputExtent, OutputExtent {
 
     /**
      * Get a list of all entities.
-     * </p>
+     *
-     * If the extent is not wholly loaded (i.e. a world being simulated in the
+     * <p>If the extent is not wholly loaded (i.e. a world being simulated in the
      * game will not have every chunk loaded), then this list may not be
-     * incomplete.
+     * incomplete.</p>
      *
      * @return a list of entities
      */

src/main/java/com/sk89q/worldedit/extent/InputExtent.java

@@ -32,20 +32,20 @@ public interface InputExtent {
 
     /**
      * Get a snapshot of the block at the given location.
-     * </p>
+     *
-     * If the given position is out of the bounds of the extent, then the behavior
+     * <p>If the given position is out of the bounds of the extent, then the behavior
-     * is undefined (an air block could be returned). However, <code>null</code>
+     * is undefined (an air block could be returned). However, {@code null}
-     * should <strong>not</strong> be returned.
+     * should <strong>not</strong> be returned.</p>
-     * </p>
+     *
-     * The returned block is mutable and is a snapshot of the block at the time
+     * <p>The returned block is mutable and is a snapshot of the block at the time
      * of call. It has no position attached to it, so it could be reused in
-     * {@link Pattern}s and so on.
+     * {@link Pattern}s and so on.</p>
-     * </p>
+     *
-     * Calls to this method can actually be quite expensive, so cache results
+     * <p>Calls to this method can actually be quite expensive, so cache results
      * whenever it is possible, while being aware of the mutability aspect.
      * The cost, however, depends on the implementation and particular extent.
      * If only basic information about the block is required, then use of
-     * {@link #getLazyBlock(Vector)} is recommended.
+     * {@link #getLazyBlock(Vector)} is recommended.</p>
      *
      * @param position position of the block
      * @return the block
@@ -55,20 +55,20 @@ public interface InputExtent {
     /**
      * Get a lazy, immutable snapshot of the block at the given location that only
      * immediately contains information about the block's type (and metadata).
-     * </p>
+     *
-     * Further information (such as NBT data) will be available <strong>by the
+     * <p>Further information (such as NBT data) will be available <strong>by the
      * time of access</strong>. Therefore, it is not recommended that
      * this method is used if the world is being simulated at the time of
      * call. If the block needs to be stored for future use, then this method should
      * definitely not be used. Moreover, the block that is returned is immutable (or
      * should be), and therefore modifications should not be attempted on it. If a
-     * modifiable copy is required, then the block should be cloned.
+     * modifiable copy is required, then the block should be cloned.</p>
-     * </p>
+     *
-     * This method exists because it is sometimes important to inspect the block
+     * <p>This method exists because it is sometimes important to inspect the block
      * at a given location, but {@link #getBlock(Vector)} may be too expensive in
      * the underlying implementation. It is also not possible to implement
      * caching if the returned object is mutable, so this methods allows caching
-     * implementations to be used.
+     * implementations to be used.</p>
      *
      * @param position position of the block
      * @return the block

src/main/java/com/sk89q/worldedit/extent/OutputExtent.java

@@ -37,13 +37,13 @@ public interface OutputExtent {
      * Change the block at the given location to the given block. The operation may
      * not tie the given {@link BaseBlock} to the world, so future changes to the
      * {@link BaseBlock} do not affect the world until this method is called again.
-     * </p>
+     *
-     * The return value of this method indicates whether the change was probably
+     * <p>The return value of this method indicates whether the change was probably
      * successful. It may not be successful if, for example, the location is out
      * of the bounds of the extent. It may be unsuccessful if the block passed
      * is the same as the one in the world. However, the return value is only an
      * estimation and it may be incorrect, but it could be used to count, for
-     * example, the approximate number of changes.
+     * example, the approximate number of changes.</p>
      *
      * @param position position of the block
      * @param block block to set

src/main/java/com/sk89q/worldedit/extent/buffer/ForgetfulExtentBuffer.java

@@ -42,9 +42,9 @@ import static com.google.common.base.Preconditions.checkNotNull;
 /**
  * Buffers changes to an {@link Extent} and allows later retrieval for
  * actual application of the changes.
- * </p>
+ *
- * This buffer will not attempt to return results from the buffer when
+ * <p>This buffer will not attempt to return results from the buffer when
- * accessor methods (such as {@link #getBlock(Vector)}) are called.
+ * accessor methods (such as {@link #getBlock(Vector)}) are called.</p>
  */
 public class ForgetfulExtentBuffer extends AbstractDelegateExtent implements Pattern {
 

src/main/java/com/sk89q/worldedit/extent/clipboard/BlockArrayClipboard.java

@@ -51,8 +51,8 @@ public class BlockArrayClipboard implements Clipboard {
 
     /**
      * Create a new instance.
-     * <p>
+     *
-     * The origin will be placed at the region's lowest minimum point.
+     * <p>The origin will be placed at the region's lowest minimum point.</p>
      *
      * @param region the bounding region
      */

src/main/java/com/sk89q/worldedit/extent/clipboard/StoredEntity.java

@@ -28,8 +28,8 @@ import static com.google.common.base.Preconditions.checkNotNull;
 
 /**
  * An implementation of {@link Entity} that stores a {@link BaseEntity} with it.
- * </p>
+ *
- * Calls to {@link #getState()} return a clone.
+ * <p>Calls to {@link #getState()} return a clone.</p>
  */
 abstract class StoredEntity implements Entity {
 

src/main/java/com/sk89q/worldedit/extent/inventory/BlockBag.java

@@ -24,15 +24,14 @@ import com.sk89q.worldedit.blocks.*;
 
 /**
  * Represents a source to get blocks from and store removed ones.
- *
- * @author sk89q
  */
 public abstract class BlockBag {
+
     /**
      * Stores a block as if it was mined.
      * 
-     * @param id
+     * @param id the type ID
-     * @throws BlockBagException
+     * @throws BlockBagException on error
      * @deprecated Use {@link BlockBag#storeDroppedBlock(int, int)} instead
      */
     @Deprecated
@@ -43,9 +42,9 @@ public abstract class BlockBag {
     /**
      * Stores a block as if it was mined.
      * 
-     * @param id
+     * @param id the type ID
-     * @param data 
+     * @param data the data value
-     * @throws BlockBagException
+     * @throws BlockBagException on error
      */
     public void storeDroppedBlock(int id, int data) throws BlockBagException {
         BaseItem dropped = BlockType.getBlockBagItem(id, data);
@@ -58,8 +57,8 @@ public abstract class BlockBag {
     /**
      * Sets a block as if it was placed by hand.
      *
-     * @param id
+     * @param id the type ID
-     * @throws BlockBagException
+     * @throws BlockBagException on error
      * @deprecated Use {@link #fetchPlacedBlock(int,int)} instead
      */
     @Deprecated
@@ -70,9 +69,9 @@ public abstract class BlockBag {
     /**
      * Sets a block as if it was placed by hand.
      *
-     * @param id
+     * @param id the type ID
-     * @param data TODO
+     * @param data the data value
-     * @throws BlockBagException
+     * @throws BlockBagException on error
      */
     public void fetchPlacedBlock(int id, int data) throws BlockBagException {
         try {
@@ -117,10 +116,10 @@ public abstract class BlockBag {
     /**
      * Get a block.
      *
-     * Either this method or fetchItem needs to be overridden
+     * <p>Either this method or fetchItem needs to be overridden.</p>
      *
-     * @param id
+     * @param id the type ID
-     * @throws BlockBagException 
+     * @throws BlockBagException on error
      */
     public void fetchBlock(int id) throws BlockBagException {
         fetchItem(new BaseItem(id));
@@ -129,10 +128,10 @@ public abstract class BlockBag {
     /**
      * Get a block.
      *
-     * Either this method or fetchBlock needs to be overridden
+     * <p>Either this method or fetchItem needs to be overridden.</p>
      *
-     * @param item
+     * @param item the item
-     * @throws BlockBagException 
+     * @throws BlockBagException on error
      */
     public void fetchItem(BaseItem item) throws BlockBagException {
         fetchBlock(item.getType());
@@ -141,10 +140,10 @@ public abstract class BlockBag {
     /**
      * Store a block.
      *
-     * Either this method or storeItem needs to be overridden
+     * <p>Either this method or fetchItem needs to be overridden.</p>
      * 
-     * @param id
+     * @param id the type ID
-     * @throws BlockBagException 
+     * @throws BlockBagException on error
      */
     public void storeBlock(int id) throws BlockBagException {
         storeItem(new BaseItem(id));
@@ -153,10 +152,10 @@ public abstract class BlockBag {
     /**
      * Store a block.
      *
-     * Either this method or storeBlock needs to be overridden
+     * <p>Either this method or fetchItem needs to be overridden.</p>
      * 
-     * @param item
+     * @param item the item
-     * @throws BlockBagException 
+     * @throws BlockBagException on error
      */
     public void storeItem(BaseItem item) throws BlockBagException {
         storeBlock(item.getType());
@@ -165,7 +164,7 @@ public abstract class BlockBag {
     /**
      * Checks to see if a block exists without removing it.
      * 
-     * @param id
+     * @param id the type ID
      * @return whether the block exists
      */
     public boolean peekBlock(int id) {
@@ -186,14 +185,14 @@ public abstract class BlockBag {
     /**
      * Adds a position to be used a source.
      *
-     * @param pos
+     * @param pos the position
      */
     public abstract void addSourcePosition(WorldVector pos);
 
     /**
      * Adds a position to be used a source.
      *
-     * @param pos
+     * @param pos the position
      */
     public abstract void addSingleSourcePosition(WorldVector pos);
 }

src/main/java/com/sk89q/worldedit/extent/inventory/BlockBagException.java

@@ -20,9 +20,7 @@
 package com.sk89q.worldedit.extent.inventory;
 
 /**
- *
+ * Thrown when a block bag detects a problem.
- * @author sk89q
  */
 public class BlockBagException extends Exception {
-    private static final long serialVersionUID = 4672190086028430655L;
 }

src/main/java/com/sk89q/worldedit/extent/inventory/BlockBagExtent.java

@@ -44,7 +44,6 @@ public class BlockBagExtent extends AbstractDelegateExtent {
      * Create a new instance.
      *
      * @param extent the extent
-     * @param world the world
      * @param blockBag the block bag
      */
     public BlockBagExtent(Extent extent, @Nullable BlockBag blockBag) {

src/main/java/com/sk89q/worldedit/extent/inventory/OutOfBlocksException.java

@@ -20,9 +20,7 @@
 package com.sk89q.worldedit.extent.inventory;
 
 /**
- *
+ * Thrown when there are no more blocks left.
- * @author sk89q
  */
 public class OutOfBlocksException extends BlockBagException {
-    private static final long serialVersionUID = 7495899825677689509L;
 }

src/main/java/com/sk89q/worldedit/extent/inventory/OutOfSpaceException.java

@@ -20,26 +20,24 @@
 package com.sk89q.worldedit.extent.inventory;
 
 /**
- *
+ * Thrown when the target inventory of a block bag is full.
- * @author sk89q
  */
 public class OutOfSpaceException extends BlockBagException {
-    private static final long serialVersionUID = -2962840237632916821L;
 
-    /**
-     * Stores the block ID.
-     */
     private int id;
 
     /**
      * Construct the object.
-     * @param id
+     *
+     * @param id the ID of the block
      */
     public OutOfSpaceException(int id) {
         this.id = id;
     }
 
     /**
+     * Get the ID of the block
+     *
      * @return the id
      */
     public int getID() {

src/main/java/com/sk89q/worldedit/extent/inventory/UnplaceableBlockException.java

@@ -20,10 +20,7 @@
 package com.sk89q.worldedit.extent.inventory;
 
 /**
- * 
+ * Thrown when a block that can't be placed is used.
- * @author sk89q
  */
 public class UnplaceableBlockException extends BlockBagException {
-    private static final long serialVersionUID = 7227883966999843526L;
-
 }

src/main/java/com/sk89q/worldedit/extent/reorder/MultiStageReorder.java

@@ -186,7 +186,7 @@ public class MultiStageReorder extends AbstractDelegateExtent implements Reorder
                     current = current.add(attachment.vector()).toBlockVector();
 
                     if (!blocks.contains(current)) {
-                        // We ran outside the remaing set => assume we can place blocks on this
+                        // We ran outside the remaining set => assume we can place blocks on this
                         break;
                     }
 

src/main/java/com/sk89q/worldedit/extent/reorder/ReorderingExtent.java

@@ -24,10 +24,10 @@ import com.sk89q.worldedit.extent.Extent;
 /**
  * An interface for {@link Extent}s that are meant to reorder changes so
  * that they are more successful.
- * </p>
+ *
- * For example, torches in Minecraft need to be placed on a block. A smart
+ * <p>For example, torches in Minecraft need to be placed on a block. A smart
  * reordering implementation might place the torch after the block has
- * been placed.
+ * been placed.</p>
  */
 public interface ReorderingExtent extends Extent {
 

src/main/java/com/sk89q/worldedit/extent/world/SurvivalModeExtent.java

@@ -31,11 +31,11 @@ import static com.google.common.base.Preconditions.checkNotNull;
 
 /**
  * Makes changes to the world as if a player had done so during survival mode.
- * </p>
+ *
- * Note that this extent may choose to not call the underlying
+ * <p>Note that this extent may choose to not call the underlying
  * extent and may instead call methods on the {@link World} that is passed
  * in the constructor. For that reason, if you wish to "catch" changes, you
- * should catch them before the changes reach this extent.
+ * should catch them before the changes reach this extent.</p>
  */
 public class SurvivalModeExtent extends AbstractDelegateExtent {
 
@@ -57,10 +57,10 @@ public class SurvivalModeExtent extends AbstractDelegateExtent {
     /**
      * Return whether changes to the world should be simulated with the
      * use of game tools (such as pickaxes) whenever possible and reasonable.
-     * </p>
+     *
-     * For example, we could pretend that the act of setting a coal ore block
+     * <p>For example, we could pretend that the act of setting a coal ore block
      * to air (nothing) was the act of a player mining that coal ore block
-     * with a pickaxe, which would mean that a coal item would be dropped.
+     * with a pickaxe, which would mean that a coal item would be dropped.</p>
      *
      * @return true if tool use is to be simulated
      */

src/main/java/com/sk89q/worldedit/function/LayerFunction.java

@@ -39,9 +39,9 @@ public interface LayerFunction {
 
     /**
      * Apply the function to the given position.
-     * </p>
+     *
-     * The depth would be the number of blocks from the surface if
+     * <p>The depth would be the number of blocks from the surface if
-     * a {@link LayerVisitor} was used.
+     * a {@link LayerVisitor} was used.</p>
      *
      * @param position the position
      * @param depth the depth as a number starting from 0

src/main/java/com/sk89q/worldedit/function/generator/FloraGenerator.java

@@ -31,9 +31,9 @@ import com.sk89q.worldedit.function.pattern.RandomPattern;
 
 /**
  * Generates flora (which may include tall grass, flowers, etc.).
- * <p>
+ *
- * The current implementation is not biome-aware, but it may become so in
+ * <p>The current implementation is not biome-aware, but it may become so in
- * the future.
+ * the future.</p>
  */
 public class FloraGenerator implements RegionFunction {
 
@@ -53,8 +53,9 @@ public class FloraGenerator implements RegionFunction {
 
     /**
      * Return whether the flora generator is set to be biome-aware.
-     * <p>
+     *
-     * By default, it is currently disabled by default, but this may change.
+     * <p>By default, it is currently disabled by default, but
+     * this may change.</p>
      *
      * @return true if biome aware
      */
@@ -64,8 +65,8 @@ public class FloraGenerator implements RegionFunction {
 
     /**
      * Set whether the generator is biome aware.
-     * <p>
+     *
-     * It is currently not possible to make the generator biome-aware.
+     * <p>It is currently not possible to make the generator biome-aware.</p>
      *
      * @param biomeAware must always be false
      */
@@ -73,7 +74,6 @@ public class FloraGenerator implements RegionFunction {
         if (biomeAware) {
             throw new IllegalArgumentException("Cannot enable biome-aware mode; not yet implemented");
         }
-        this.biomeAware = biomeAware;
     }
 
     /**

src/main/java/com/sk89q/worldedit/function/mask/Masks.java

@@ -133,10 +133,10 @@ public final class Masks {
 
     /**
      * Wrap an old-style mask and convert it to a new mask.
-     * </p>
+     *
-     * Note, however, that this is strongly not recommended because
+     * <p>Note, however, that this is strongly not recommended because
      * {@link com.sk89q.worldedit.masks.Mask#prepare(LocalSession, LocalPlayer, Vector)}
-     * is not called.
+     * is not called.</p>
      *
      * @param mask the old-style mask
      * @param editSession the edit session to bind to
@@ -163,10 +163,10 @@ public final class Masks {
 
     /**
      * Wrap an old-style mask and convert it to a new mask.
-     * </p>
+     *
-     * As an {@link EditSession} is not provided in this case, one will be
+     * <p>As an {@link EditSession} is not provided in this case, one will be
      * taken from the {@link Request}, if possible. If not possible, then the
-     * mask will return false.
+     * mask will return false.</p>
      *
      * @param mask the old-style mask
      * @return a new-style mask

src/main/java/com/sk89q/worldedit/function/mask/NoiseFilter.java

@@ -77,8 +77,6 @@ public class NoiseFilter extends AbstractMask {
 
     /**
      * Set the probability of passing as a number between 0 and 1 (inclusive).
-     *
-     * @return the density
      */
     public void setDensity(double density) {
         checkArgument(density >= 0, "density must be >= 0");

src/main/java/com/sk89q/worldedit/function/mask/NoiseFilter2D.java

@@ -75,8 +75,6 @@ public class NoiseFilter2D extends AbstractMask2D {
 
     /**
      * Set the probability of passing as a number between 0 and 1 (inclusive).
-     *
-     * @return the density
      */
     public void setDensity(double density) {
         checkArgument(density >= 0, "density must be >= 0");

src/main/java/com/sk89q/worldedit/function/operation/ForwardExtentCopy.java

@@ -43,10 +43,10 @@ import static com.google.common.base.Preconditions.checkNotNull;
 
 /**
  * Makes a copy of a portion of one extent to another extent or another point.
- * </p>
+ *
- * This is a forward extent copy, meaning that it iterates over the blocks in the
+ * <p>This is a forward extent copy, meaning that it iterates over the blocks
- * source extent, and will copy as many blocks as there are in the source.
+ * in the source extent, and will copy as many blocks as there are in the
- * Therefore, interpolation will not occur to fill in the gaps.
+ * source. Therefore, interpolation will not occur to fill in the gaps.</p>
  */
 public class ForwardExtentCopy implements Operation {
 
@@ -102,8 +102,8 @@ public class ForwardExtentCopy implements Operation {
 
     /**
      * Get the transformation that will occur on every point.
-     * </p>
+     *
-     * The transformation will stack with each repetition.
+     * <p>The transformation will stack with each repetition.</p>
      *
      * @return a transformation
      */
@@ -124,8 +124,8 @@ public class ForwardExtentCopy implements Operation {
 
     /**
      * Get the mask that gets applied to the source extent.
-     * </p>
+     *
-     * This mask can be used to filter what will be copied from the source.
+     * <p>This mask can be used to filter what will be copied from the source.</p>
      *
      * @return a source mask
      */
@@ -195,7 +195,7 @@ public class ForwardExtentCopy implements Operation {
     /**
      * Set whether entities that are copied should be removed.
      *
-     * @param removing true if removing
+     * @param removingEntities true if removing
      */
     public void setRemovingEntities(boolean removingEntities) {
         this.removingEntities = removingEntities;

src/main/java/com/sk89q/worldedit/function/operation/OperationQueue.java

@@ -77,7 +77,7 @@ public class OperationQueue implements Operation {
 
     @Override
     public Operation resume(RunContext run) throws WorldEditException {
-        if (current == null && queue.size() > 0) {
+        if (current == null && !queue.isEmpty()) {
             current = queue.poll();
         }
 

src/main/java/com/sk89q/worldedit/function/operation/RunContext.java

@@ -26,8 +26,8 @@ public class RunContext {
 
     /**
      * Return whether the current operation should still continue running.
-     * </p>
+     *
-     * This method can be called frequently.
+     * <p>This method can be called frequently.</p>
      *
      * @return true if the operation should continue running
      */

src/main/java/com/sk89q/worldedit/function/pattern/RandomPattern.java

@@ -39,9 +39,9 @@ public class RandomPattern extends AbstractPattern {
 
     /**
      * Add a pattern to the weight list of patterns.
-     * </p>
+     *
-     * The probability for the pattern added is chance / max where max is the sum
+     * <p>The probability for the pattern added is chance / max where max is
-     * of the probabilities of all added patterns.
+     * the sum of the probabilities of all added patterns.</p>
      *
      * @param pattern the pattern
      * @param chance the chance, which can be any positive number

src/main/java/com/sk89q/worldedit/function/visitor/BreadthFirstSearch.java

@@ -36,10 +36,10 @@ import static com.google.common.base.Preconditions.checkNotNull;
  * to a certain adjacent point provided that the method
  * {@link #isVisitable(com.sk89q.worldedit.Vector, com.sk89q.worldedit.Vector)}
  * returns true for that point.
- * </p>
+ *
- * As an abstract implementation, this class can be used to implement
+ * <p>As an abstract implementation, this class can be used to implement
  * functionality that starts at certain points and extends outward from
- * those points.
+ * those points.</p>
  */
 public abstract class BreadthFirstSearch implements Operation {
 
@@ -62,12 +62,13 @@ public abstract class BreadthFirstSearch implements Operation {
 
     /**
      * Get the list of directions will be visited.
-     * </p>
+     *
-     * Directions are {@link com.sk89q.worldedit.Vector}s that determine
+     * <p>Directions are {@link com.sk89q.worldedit.Vector}s that determine
      * what adjacent points area available. Vectors should not be
-     * unit vectors. An example of a valid direction is {@code new Vector(1, 0, 1)}.
+     * unit vectors. An example of a valid direction is
-     * </p>
+     * {@code new Vector(1, 0, 1)}.</p>
-     * The list of directions can be cleared.
+     *
+     * <p>The list of directions can be cleared.</p>
      *
      * @return the list of directions
      */

src/main/java/com/sk89q/worldedit/function/visitor/DownwardVisitor.java

@@ -31,8 +31,8 @@ import static com.google.common.base.Preconditions.checkNotNull;
  * Visits adjacent points on the same X-Z plane as long as the points
  * pass the given mask, and then executes the provided region
  * function on the entire column.
- * </p>
+ *
- * This is used by <code>//fill</code>.
+ * <p>This is used by {@code //fill}.</p>
  */
 public class DownwardVisitor extends RecursiveVisitor {
 

src/main/java/com/sk89q/worldedit/function/visitor/LayerVisitor.java

@@ -34,11 +34,11 @@ import static com.google.common.base.Preconditions.checkNotNull;
 
 /**
  * Visits the layers within a region.
- * </p>
+ *
- * This class works by iterating over all the columns in a {@link FlatRegion},
+ * <p>This class works by iterating over all the columns in a {@link FlatRegion},
  * finding the first ground block in each column (searching from a given
  * maximum Y down to a minimum Y), and then applies a {@link LayerFunction} to
- * each layer.
+ * each layer.</p>
  */
 public class LayerVisitor implements Operation {
 

src/main/java/com/sk89q/worldedit/history/UndoContext.java

@@ -26,9 +26,9 @@ import javax.annotation.Nullable;
 
 /**
  * Provides context for undo and redo operations.
- * </p>
+ *
- * For example, {@link BlockChange}s take the {@link Extent} from the
+ * <p>For example, {@link BlockChange}s take the {@link Extent} from the
- * context rather than store a reference to one.
+ * context rather than store a reference to one.</p>
  */
 public class UndoContext {
 

src/main/java/com/sk89q/worldedit/history/change/BlockChange.java

@@ -29,10 +29,10 @@ import static com.google.common.base.Preconditions.checkNotNull;
 
 /**
  * Represents a block change that may be undone or replayed.
- * </p>
+ *
- * This block change does not have an {@link Extent} assigned to it because
+ * <p>This block change does not have an {@link Extent} assigned to it because
  * one will be taken from the passed {@link UndoContext}. If the context
- * does not have an extent (it is null), cryptic errors may occur.
+ * does not have an extent (it is null), cryptic errors may occur.</p>
  */
 public class BlockChange implements Change {
 

src/main/java/com/sk89q/worldedit/history/changeset/BlockOptimizedHistory.java

@@ -36,10 +36,10 @@ import static java.util.Map.Entry;
 /**
  * An extension of {@link ArrayListHistory} that stores {@link BlockChange}s
  * separately in two {@link ArrayList}s.
- * </p>
+ *
- * Whether this is a good idea or not is highly questionable, but this class
+ * <p>Whether this is a good idea or not is highly questionable, but this class
  * exists because this is how history was implemented in WorldEdit for
- * many years.
+ * many years.</p>
  */
 public class BlockOptimizedHistory extends ArrayListHistory {
 

src/main/java/com/sk89q/worldedit/history/changeset/ChangeSet.java

@@ -38,9 +38,9 @@ public interface ChangeSet {
 
     /**
      * Get a backward directed iterator that can be used for undo.
-     * </p>
+     *
-     * The iterator may return the changes out of order, as long as the final
+     * <p>The iterator may return the changes out of order, as long as the final
-     * result after all changes have been applied is correct.
+     * result after all changes have been applied is correct.</p>
      *
      * @return a undo directed iterator
      */
@@ -48,9 +48,9 @@ public interface ChangeSet {
 
     /**
      * Get a forward directed iterator that can be used for redo.
-     * </p>
+     *
-     * The iterator may return the changes out of order, as long as the final
+     * <p>The iterator may return the changes out of order, as long as the final
-     * result after all changes have been applied is correct.
+     * result after all changes have been applied is correct.</p>
      *
      * @return a forward directed iterator
      */

src/main/java/com/sk89q/worldedit/internal/LocalWorldAdapter.java

@@ -47,6 +47,7 @@ import static com.google.common.base.Preconditions.checkNotNull;
 /**
  * Wraps {@link World}s into {@link LocalWorld}.
  */
+@SuppressWarnings("deprecation")
 public class LocalWorldAdapter extends LocalWorld {
 
     private final World world;
@@ -203,6 +204,7 @@ public class LocalWorldAdapter extends LocalWorld {
         return world.getWorldData();
     }
 
+    @SuppressWarnings("EqualsWhichDoesntCheckParameterClass")
     @Override
     public boolean equals(Object other) {
         return world.equals(other);

src/main/java/com/sk89q/worldedit/internal/ServerInterfaceAdapter.java

@@ -37,6 +37,7 @@ import static com.google.common.base.Preconditions.checkNotNull;
 /**
  * Adapts {@link Platform}s into the legacy {@link ServerInterface}.
  */
+@SuppressWarnings("ALL")
 public class ServerInterfaceAdapter extends ServerInterface {
 
     private final Platform platform;

src/main/java/com/sk89q/worldedit/internal/cui/CUIRegion.java

@@ -19,7 +19,6 @@
 
 package com.sk89q.worldedit.internal.cui;
 
-import com.sk89q.worldedit.LocalPlayer;
 import com.sk89q.worldedit.LocalSession;
 import com.sk89q.worldedit.extension.platform.Actor;
 
@@ -46,13 +45,14 @@ public interface CUIRegion {
      * up-to-date data. If the CUI version is smaller than
      * this value, the legacy methods will be called.
      * 
-     * @return 
+     * @return the protocol version
      */
     public int getProtocolVersion();
     
     /**
      * Returns the type ID to send to CUI in the selection event.
-     * @return 
+     *
+     * @return the type ID
      */
     public String getTypeID();
     
@@ -60,7 +60,7 @@ public interface CUIRegion {
      * Returns the type ID to send to CUI in the selection
      * event if the CUI is in legacy mode.
      * 
-     * @return 
+     * @return the legacy type ID
      */
     public String getLegacyTypeID();
 }

src/main/java/com/sk89q/worldedit/internal/cui/SelectionCylinderEvent.java

@@ -34,10 +34,12 @@ public class SelectionCylinderEvent implements CUIEvent {
         this.radius = radius;
     }
 
+    @Override
     public String getTypeId() {
         return "cyl";
     }
 
+    @Override
     public String[] getParameters() {
         return new String[] {
                     String.valueOf(pos.getBlockX()),

src/main/java/com/sk89q/worldedit/internal/cui/SelectionEllipsoidPointEvent.java

@@ -22,6 +22,7 @@ package com.sk89q.worldedit.internal.cui;
 import com.sk89q.worldedit.Vector;
 
 public class SelectionEllipsoidPointEvent implements CUIEvent {
+
     protected final int id;
     protected final Vector pos;
 
@@ -30,10 +31,12 @@ public class SelectionEllipsoidPointEvent implements CUIEvent {
         this.pos = pos;
     }
 
+    @Override
     public String getTypeId() {
         return "e";
     }
 
+    @Override
     public String[] getParameters() {
         return new String[] {
                     String.valueOf(id),
@@ -42,4 +45,5 @@ public class SelectionEllipsoidPointEvent implements CUIEvent {
                     String.valueOf(pos.getBlockZ())
                 };
     }
+
 }

src/main/java/com/sk89q/worldedit/internal/cui/SelectionMinMaxEvent.java

@@ -29,10 +29,12 @@ public class SelectionMinMaxEvent implements CUIEvent {
         this.max = max;
     }
 
+    @Override
     public String getTypeId() {
         return "mm";
     }
 
+    @Override
     public String[] getParameters() {
         return new String[] {
                     String.valueOf(min),

src/main/java/com/sk89q/worldedit/internal/cui/SelectionPoint2DEvent.java

@@ -43,10 +43,12 @@ public class SelectionPoint2DEvent implements CUIEvent {
         this.area = area;
     }
 
+    @Override
     public String getTypeId() {
         return "p2";
     }
 
+    @Override
     public String[] getParameters() {
         return new String[] {
                     String.valueOf(id),

src/main/java/com/sk89q/worldedit/internal/cui/SelectionPointEvent.java

@@ -33,10 +33,12 @@ public class SelectionPointEvent implements CUIEvent {
         this.area = area;
     }
 
+    @Override
     public String getTypeId() {
         return "p";
     }
 
+    @Override
     public String[] getParameters() {
         return new String[] {
                     String.valueOf(id),

src/main/java/com/sk89q/worldedit/internal/cui/SelectionPolygonEvent.java

@@ -22,16 +22,19 @@
 package com.sk89q.worldedit.internal.cui;
 
 public class SelectionPolygonEvent implements CUIEvent {
+
     protected final int[] vertices;
 
     public SelectionPolygonEvent(int... vertices) {
         this.vertices = vertices;
     }
 
+    @Override
     public String getTypeId() {
         return "poly";
     }
 
+    @Override
     public String[] getParameters() {
         final String[] ret = new String[vertices.length];
 
@@ -42,4 +45,5 @@ public class SelectionPolygonEvent implements CUIEvent {
 
         return ret;
     }
+
 }

src/main/java/com/sk89q/worldedit/internal/cui/SelectionShapeEvent.java

@@ -27,10 +27,12 @@ public class SelectionShapeEvent implements CUIEvent {
         this.shapeName = shapeName;
     }
 
+    @Override
     public String getTypeId() {
         return "s";
     }
 
+    @Override
     public String[] getParameters() {
         return new String[] { shapeName };
     }

src/main/java/com/sk89q/worldedit/internal/expression/Expression.java

@@ -19,47 +19,57 @@
 
 package com.sk89q.worldedit.internal.expression;
 
-import java.util.HashMap;
-import java.util.List;
-import java.util.Map;
-import java.util.Stack;
-
 import com.sk89q.worldedit.internal.expression.lexer.Lexer;
 import com.sk89q.worldedit.internal.expression.lexer.tokens.Token;
 import com.sk89q.worldedit.internal.expression.parser.Parser;
-import com.sk89q.worldedit.internal.expression.runtime.ExpressionEnvironment;
 import com.sk89q.worldedit.internal.expression.runtime.Constant;
 import com.sk89q.worldedit.internal.expression.runtime.EvaluationException;
+import com.sk89q.worldedit.internal.expression.runtime.ExpressionEnvironment;
 import com.sk89q.worldedit.internal.expression.runtime.Functions;
 import com.sk89q.worldedit.internal.expression.runtime.RValue;
 import com.sk89q.worldedit.internal.expression.runtime.ReturnException;
 import com.sk89q.worldedit.internal.expression.runtime.Variable;
 
+import java.util.HashMap;
+import java.util.List;
+import java.util.Map;
+import java.util.Stack;
+
 /**
  * Compiles and evaluates expressions.
  *
- * Supported operators:
+ * <p>Supported operators:</p>
- * Logical: &&, ||, ! (unary)
- * Bitwise: ~ (unary), >>, << 
- * Arithmetic: +, -, *, /, % (modulo), ^ (power), - (unary), --, ++ (prefix only)
- * Comparison: <=, >=, >, <, ==, !=, ~= (near)
  *
- * Supported functions: abs, acos, asin, atan, atan2, cbrt, ceil, cos, cosh, exp, floor, ln, log, log10, max, max, min, min, rint, round, sin, sinh, sqrt, tan, tanh and more. (See the Functions class or the wiki)
+ * <ul>
+ *     <li>Logical: &&, ||, ! (unary)</li>
+ *     <li>Bitwise: ~ (unary), &gt;&gt;, &lt;&lt;</li>
+ *     <li>Arithmetic: +, -, *, /, % (modulo), ^ (power), - (unary), --, ++ (prefix only)</li>
+ *     <li>Comparison: &lt;=, &gt;=, &gt;, &lt;, ==, !=, ~= (near)</li>
+ * </ul>
  *
- * Constants: e, pi
+ * <p>Supported functions: abs, acos, asin, atan, atan2, cbrt, ceil, cos, cosh,
+ * exp, floor, ln, log, log10, max, max, min, min, rint, round, sin, sinh,
+ * sqrt, tan, tanh and more. (See the Functions class or the wiki)</p>
  *
- * To compile an equation, run <code>Expression.compile("expression here", "var1", "var2"...)</code>
+ * <p>Constants: e, pi</p>
- * If you wish to run the equation multiple times, you can then optimize it, by calling myExpression.optimize();
- * You can then run the equation as many times as you want by calling myExpression.evaluate(var1, var2...)
- * You do not need to pass values for all variables specified while compiling.
- * To query variables after evaluation, you can use myExpression.getVariable("variable name").
- * To get a value out of these, use myVariable.getValue()
  *
- * Variables are also supported and can be set either by passing values to <code>evaluate</code>
+ * <p>To compile an equation, run
+ * {@code Expression.compile("expression here", "var1", "var2"...)}.
+ * If you wish to run the equation multiple times, you can then optimize it,
+ * by calling {@link #optimize()}. You can then run the equation as many times
+ * as you want by calling {@link #evaluate(double...)}. You do not need to
+ * pass values for all variables specified while compiling.
+ * To query variables after evaluation, you can use
+ * {@link #getVariable(String, boolean)}. To get a value out of these, use
+ * {@link Variable#getValue()}.</p>
+ *
+ * <p>Variables are also supported and can be set either by passing values
+ * to {@link #evaluate(double...)}.</p>
  *
  * @author TomyLobo
  */
 public class Expression {
+
     private static final ThreadLocal<Stack<Expression>> instance = new ThreadLocal<Stack<Expression>>();
 
     private final Map<String, RValue> variables = new HashMap<String, RValue>();
@@ -167,4 +177,5 @@ public class Expression {
     public void setEnvironment(ExpressionEnvironment environment) {
         this.environment = environment;
     }
+
 }

src/main/java/com/sk89q/worldedit/internal/expression/ExpressionException.java

@@ -20,12 +20,10 @@
 package com.sk89q.worldedit.internal.expression;
 
 /**
- * Thrown when there's a problem during any stage of the expression compilation or evaluation.
+ * Thrown when there's a problem during any stage of the expression
- *
+ * compilation or evaluation.
- * @author TomyLobo
  */
 public class ExpressionException extends Exception {
-    private static final long serialVersionUID = 1L;
 
     private final int position;
 
@@ -51,4 +49,5 @@ public class ExpressionException extends Exception {
     public int getPosition() {
         return position;
     }
+
 }

src/main/java/com/sk89q/worldedit/internal/expression/Identifiable.java

@@ -21,10 +21,9 @@ package com.sk89q.worldedit.internal.expression;
 
 /**
  * A common superinterface for everything passed to parser processors.
- *
- * @author TomyLobo
  */
 public interface Identifiable {
+
     /**
      * Returns a character that helps identify the token, pseudo-token or invokable in question.
      *
@@ -58,4 +57,5 @@ public interface Identifiable {
     public abstract char id();
 
     public int getPosition();
+
 }

src/main/java/com/sk89q/worldedit/internal/expression/lexer/Lexer.java

@@ -19,6 +19,13 @@
 
 package com.sk89q.worldedit.internal.expression.lexer;
 
+import com.sk89q.worldedit.internal.expression.lexer.tokens.CharacterToken;
+import com.sk89q.worldedit.internal.expression.lexer.tokens.IdentifierToken;
+import com.sk89q.worldedit.internal.expression.lexer.tokens.KeywordToken;
+import com.sk89q.worldedit.internal.expression.lexer.tokens.NumberToken;
+import com.sk89q.worldedit.internal.expression.lexer.tokens.OperatorToken;
+import com.sk89q.worldedit.internal.expression.lexer.tokens.Token;
+
 import java.util.ArrayList;
 import java.util.Arrays;
 import java.util.HashMap;
@@ -29,16 +36,14 @@ import java.util.Set;
 import java.util.regex.Matcher;
 import java.util.regex.Pattern;
 
-import com.sk89q.worldedit.internal.expression.lexer.tokens.*;
-
 /**
  * Processes a string into a list of tokens.
  *
- * Tokens can be numbers, identifiers, operators and assorted other characters.
+ * <p>Tokens can be numbers, identifiers, operators and assorted other
- *
+ * characters.</p>
- * @author TomyLobo
  */
 public class Lexer {
+
     private final String expression;
     private int position = 0;
 
@@ -46,7 +51,7 @@ public class Lexer {
         this.expression = expression;
     }
 
-    public static final List<Token> tokenize(String expression) throws LexerException {
+    public static List<Token> tokenize(String expression) throws LexerException {
         return new Lexer(expression).tokenize();
     }
 
@@ -114,7 +119,7 @@ public class Lexer {
     private static final Pattern numberPattern = Pattern.compile("^([0-9]*(?:\\.[0-9]+)?(?:[eE][+-]?[0-9]+)?)");
     private static final Pattern identifierPattern = Pattern.compile("^([A-Za-z][0-9A-Za-z_]*)");
 
-    private final List<Token> tokenize() throws LexerException {
+    private List<Token> tokenize() throws LexerException {
         List<Token> tokens = new ArrayList<Token>();
 
         do {
@@ -139,7 +144,7 @@ public class Lexer {
             final Matcher numberMatcher = numberPattern.matcher(expression.substring(position));
             if (numberMatcher.lookingAt()) {
                 String numberPart = numberMatcher.group(1);
-                if (numberPart.length() > 0) {
+                if (!numberPart.isEmpty()) {
                     try {
                         tokens.add(new NumberToken(position, Double.parseDouble(numberPart)));
                     } catch (NumberFormatException e) {
@@ -154,7 +159,7 @@ public class Lexer {
             final Matcher identifierMatcher = identifierPattern.matcher(expression.substring(position));
             if (identifierMatcher.lookingAt()) {
                 String identifierPart = identifierMatcher.group(1);
-                if (identifierPart.length() > 0) {
+                if (!identifierPart.isEmpty()) {
                     if (keywords.contains(identifierPart)) {
                         tokens.add(new KeywordToken(position, identifierPart));
                     } else {
@@ -176,7 +181,7 @@ public class Lexer {
         return expression.charAt(position);
     }
 
-    private final void skipWhitespace() {
+    private void skipWhitespace() {
         while (position < expression.length() && Character.isWhitespace(peek())) {
             ++position;
         }
@@ -230,4 +235,5 @@ public class Lexer {
             return new OperatorToken(startPosition, tokenName);
         }
     }
+
 }

src/main/java/com/sk89q/worldedit/internal/expression/lexer/LexerException.java

@@ -23,11 +23,8 @@ import com.sk89q.worldedit.internal.expression.ExpressionException;
 
 /**
  * Thrown when the lexer encounters a problem.
- *
- * @author TomyLobo
  */
 public class LexerException extends ExpressionException {
-    private static final long serialVersionUID = 1L;
 
     public LexerException(int position) {
         super(position, getPrefix(position));
@@ -48,4 +45,5 @@ public class LexerException extends ExpressionException {
     private static String getPrefix(int position) {
         return position < 0 ? "Lexer error" : ("Lexer error at " + (position + 1));
     }
+
 }

src/main/java/com/sk89q/worldedit/internal/expression/lexer/tokens/CharacterToken.java

@@ -21,10 +21,9 @@ package com.sk89q.worldedit.internal.expression.lexer.tokens;
 
 /**
  * A single character that doesn't fit any of the other token categories.
- *
- * @author TomyLobo
  */
 public class CharacterToken extends Token {
+
     public final char character;
 
     public CharacterToken(int position, char character) {
@@ -41,4 +40,5 @@ public class CharacterToken extends Token {
     public String toString() {
         return "CharacterToken(" + character + ")";
     }
+
 }

src/main/java/com/sk89q/worldedit/internal/expression/lexer/tokens/IdentifierToken.java

@@ -20,11 +20,10 @@
 package com.sk89q.worldedit.internal.expression.lexer.tokens;
 
 /**
- * An identifier
+ * An identifier.
- *
- * @author TomyLobo
  */
 public class IdentifierToken extends Token {
+
     public final String value;
 
     public IdentifierToken(int position, String value) {
@@ -41,4 +40,5 @@ public class IdentifierToken extends Token {
     public String toString() {
         return "IdentifierToken(" + value + ")";
     }
+
 }

src/main/java/com/sk89q/worldedit/internal/expression/lexer/tokens/KeywordToken.java

@@ -20,11 +20,10 @@
 package com.sk89q.worldedit.internal.expression.lexer.tokens;
 
 /**
- * A keyword
+ * A keyword.
- *
- * @author TomyLobo
  */
 public class KeywordToken extends Token {
+
     public final String value;
 
     public KeywordToken(int position, String value) {
@@ -41,4 +40,5 @@ public class KeywordToken extends Token {
     public String toString() {
         return "KeywordToken(" + value + ")";
     }
+
 }

src/main/java/com/sk89q/worldedit/internal/expression/lexer/tokens/NumberToken.java

@@ -20,11 +20,10 @@
 package com.sk89q.worldedit.internal.expression.lexer.tokens;
 
 /**
- * A number
+ * A number.
- *
- * @author TomyLobo
  */
 public class NumberToken extends Token {
+
     public final double value;
 
     public NumberToken(int position, double value) {
@@ -41,4 +40,5 @@ public class NumberToken extends Token {
     public String toString() {
         return "NumberToken(" + value + ")";
     }
+
 }

src/main/java/com/sk89q/worldedit/internal/expression/lexer/tokens/OperatorToken.java

@@ -21,10 +21,9 @@ package com.sk89q.worldedit.internal.expression.lexer.tokens;
 
 /**
  * A unary or binary operator.
- *
- * @author TomyLobo
  */
 public class OperatorToken extends Token {
+
     public final String operator;
 
     public OperatorToken(int position, String operator) {
@@ -41,4 +40,5 @@ public class OperatorToken extends Token {
     public String toString() {
         return "OperatorToken(" + operator + ")";
     }
+
 }

src/main/java/com/sk89q/worldedit/internal/expression/lexer/tokens/Token.java

@@ -23,10 +23,9 @@ import com.sk89q.worldedit.internal.expression.Identifiable;
 
 /**
  * A token. The lexer generates these to make the parser's job easier.
- *
- * @author TomyLobo
  */
 public abstract class Token implements Identifiable {
+
     private final int position;
 
     public Token(int position) {
@@ -37,4 +36,5 @@ public abstract class Token implements Identifiable {
     public int getPosition() {
         return position;
     }
+
 }

src/main/java/com/sk89q/worldedit/internal/expression/parser/Parser.java

@@ -19,9 +19,6 @@
 
 package com.sk89q.worldedit.internal.expression.parser;
 
-import java.util.ArrayList;
-import java.util.LinkedList;
-import java.util.List;
 import com.sk89q.worldedit.internal.expression.Expression;
 import com.sk89q.worldedit.internal.expression.Identifiable;
 import com.sk89q.worldedit.internal.expression.lexer.tokens.IdentifierToken;
@@ -43,12 +40,14 @@ import com.sk89q.worldedit.internal.expression.runtime.SimpleFor;
 import com.sk89q.worldedit.internal.expression.runtime.Switch;
 import com.sk89q.worldedit.internal.expression.runtime.While;
 
+import java.util.ArrayList;
+import java.util.LinkedList;
+import java.util.List;
+
 /**
  * Processes a list of tokens into an executable tree.
  *
- * Tokens can be numbers, identifiers, operators and assorted other characters.
+ * <p>Tokens can be numbers, identifiers, operators and assorted other characters.</p>
- *
- * @author TomyLobo
  */
 public class Parser {
     private final class NullToken extends Token {
@@ -56,6 +55,7 @@ public class Parser {
             super(position);
         }
 
+        @Override
         public char id() {
             return '\0';
         }
@@ -75,7 +75,7 @@ public class Parser {
         this.expression = expression;
     }
 
-    public static final RValue parse(List<Token> tokens, Expression expression) throws ParserException {
+    public static RValue parse(List<Token> tokens, Expression expression) throws ParserException {
         return new Parser(tokens, expression).parse();
     }
 
@@ -309,7 +309,7 @@ public class Parser {
         }
     }
 
-    private final RValue parseExpression(boolean canBeEmpty) throws ParserException {
+    private RValue parseExpression(boolean canBeEmpty) throws ParserException {
         LinkedList<Identifiable> halfProcessed = new LinkedList<Identifiable>();
 
         // process brackets, numbers, functions, variables and detect prefix operators
@@ -423,7 +423,7 @@ public class Parser {
         }
     }
 
-    private final RValue parseBracket() throws ParserException {
+    private RValue parseBracket() throws ParserException {
         consumeCharacter('(');
 
         final RValue ret = parseExpression(false);
@@ -435,10 +435,8 @@ public class Parser {
 
     private boolean hasKeyword(String keyword) {
         final Token next = peek();
-        if (!(next instanceof KeywordToken)) {
+
-            return false;
+        return next instanceof KeywordToken && ((KeywordToken) next).value.equals(keyword);
-        }
-        return ((KeywordToken) next).value.equals(keyword);
     }
 
     private void assertCharacter(char character) throws ParserException {

src/main/java/com/sk89q/worldedit/internal/expression/parser/ParserException.java

@@ -23,11 +23,8 @@ import com.sk89q.worldedit.internal.expression.ExpressionException;
 
 /**
  * Thrown when the parser encounters a problem.
- *
- * @author TomyLobo
  */
 public class ParserException extends ExpressionException {
-    private static final long serialVersionUID = 1L;
 
     public ParserException(int position) {
         super(position, getPrefix(position));
@@ -48,4 +45,5 @@ public class ParserException extends ExpressionException {
     private static String getPrefix(int position) {
         return position < 0 ? "Parser error" : ("Parser error at " + (position + 1));
     }
+
 }

src/main/java/com/sk89q/worldedit/internal/expression/parser/ParserProcessors.java

@@ -30,10 +30,9 @@ import java.util.*;
 
 /**
  * Helper classfor Parser. Contains processors for statements and operators.
- *
- * @author TomyLobo
  */
 public final class ParserProcessors {
+
     private static final Map<String, String> unaryOpMap = new HashMap<String, String>();
 
     private static final Map<String, String>[] binaryOpMapsLA;
@@ -347,4 +346,5 @@ public final class ParserProcessors {
         }
         return ret;
     }
+
 }

src/main/java/com/sk89q/worldedit/internal/expression/parser/PseudoToken.java

@@ -23,10 +23,9 @@ import com.sk89q.worldedit.internal.expression.Identifiable;
 
 /**
  * A pseudo-token, inserted by the parser instead of the lexer.
- *
- * @author TomyLobo
  */
 public abstract class PseudoToken implements Identifiable {
+
     private final int position;
 
     public PseudoToken(int position) {
@@ -40,4 +39,5 @@ public abstract class PseudoToken implements Identifiable {
     public int getPosition() {
         return position;
     }
+
 }

src/main/java/com/sk89q/worldedit/internal/expression/parser/UnaryOperator.java

@@ -23,10 +23,9 @@ import com.sk89q.worldedit.internal.expression.lexer.tokens.OperatorToken;
 
 /**
  * The parser uses this pseudo-token to mark operators as unary operators.
- *
- * @author TomyLobo
  */
 public class UnaryOperator extends PseudoToken {
+
     final String operator;
 
     public UnaryOperator(OperatorToken operatorToken) {
@@ -47,4 +46,5 @@ public class UnaryOperator extends PseudoToken {
     public String toString() {
         return "UnaryOperator(" + operator + ")";
     }
+
 }

src/main/java/com/sk89q/worldedit/internal/expression/parser/UnboundVariable.java

@@ -25,17 +25,16 @@ import com.sk89q.worldedit.internal.expression.runtime.LValue;
 import com.sk89q.worldedit.internal.expression.runtime.RValue;
 
 public class UnboundVariable extends PseudoToken implements LValue {
+
     public final String name;
 
     public UnboundVariable(int position, String name) {
         super(position);
         this.name = name;
-        // TODO Auto-generated constructor stub
     }
 
     @Override
     public char id() {
-        // TODO Auto-generated method stub
         return 'V';
     }
 
@@ -77,4 +76,5 @@ public class UnboundVariable extends PseudoToken implements LValue {
 
         return (LValue) variable;
     }
+
 }

src/main/java/com/sk89q/worldedit/internal/expression/runtime/Break.java

@@ -21,10 +21,9 @@ package com.sk89q.worldedit.internal.expression.runtime;
 
 /**
  * A break or continue statement.
- *
- * @author TomyLobo
  */
 public class Break extends Node {
+
     boolean doContinue;
 
     public Break(int position, boolean doContinue) {
@@ -47,4 +46,5 @@ public class Break extends Node {
     public String toString() {
         return doContinue ? "continue" : "break";
     }
+
 }

src/main/java/com/sk89q/worldedit/internal/expression/runtime/BreakException.java

@@ -22,11 +22,8 @@ package com.sk89q.worldedit.internal.expression.runtime;
 /**
  * Thrown when a break or continue is encountered.
  * Loop constructs catch this exception.
- *
- * @author TomyLobo
  */
 public class BreakException extends EvaluationException {
-    private static final long serialVersionUID = 1L;
 
     final boolean doContinue;
 
@@ -35,4 +32,5 @@ public class BreakException extends EvaluationException {
 
         this.doContinue = doContinue;
     }
+
 }

src/main/java/com/sk89q/worldedit/internal/expression/runtime/Conditional.java

@@ -24,10 +24,9 @@ import com.sk89q.worldedit.internal.expression.parser.ParserException;
 
 /**
  * An if/else statement or a ternary operator.
- *
- * @author TomyLobo
  */
 public class Conditional extends Node {
+
     private RValue condition;
     private RValue truePart;
     private RValue falsePart;
@@ -90,4 +89,5 @@ public class Conditional extends Node {
 
         return this;
     }
+
 }

src/main/java/com/sk89q/worldedit/internal/expression/runtime/Constant.java

@@ -21,10 +21,9 @@ package com.sk89q.worldedit.internal.expression.runtime;
 
 /**
  * A constant.
- *
- * @author TomyLobo
  */
 public final class Constant extends Node {
+
     private final double value;
 
     public Constant(int position, double value) {
@@ -46,4 +45,5 @@ public final class Constant extends Node {
     public char id() {
         return 'c';
     }
+
 }

src/main/java/com/sk89q/worldedit/internal/expression/runtime/EvaluationException.java

@@ -23,11 +23,8 @@ import com.sk89q.worldedit.internal.expression.ExpressionException;
 
 /**
  * Thrown when there's a problem during expression evaluation.
- *
- * @author TomyLobo
  */
 public class EvaluationException extends ExpressionException {
-    private static final long serialVersionUID = 1L;
 
     public EvaluationException(int position) {
         super(position, getPrefix(position));
@@ -48,4 +45,5 @@ public class EvaluationException extends ExpressionException {
     private static String getPrefix(int position) {
         return position < 0 ? "Evaluation error" : ("Evaluation error at " + (position + 1));
     }
+
 }

src/main/java/com/sk89q/worldedit/internal/expression/runtime/ExpressionEnvironment.java

@@ -23,10 +23,12 @@ package com.sk89q.worldedit.internal.expression.runtime;
  * Represents a way to access blocks in a world. Has to accept non-rounded coordinates.
  */
 public interface ExpressionEnvironment {
+
     int getBlockType(double x, double y, double z);
     int getBlockData(double x, double y, double z);
     int getBlockTypeAbs(double x, double y, double z);
     int getBlockDataAbs(double x, double y, double z);
     int getBlockTypeRel(double x, double y, double z);
     int getBlockDataRel(double x, double y, double z);
+
 }

src/main/java/com/sk89q/worldedit/internal/expression/runtime/For.java

@@ -24,10 +24,9 @@ import com.sk89q.worldedit.internal.expression.parser.ParserException;
 
 /**
  * A Java/C-style for loop.
- *
- * @author TomyLobo
  */
 public class For extends Node {
+
     RValue init;
     RValue condition;
     RValue increment;
@@ -101,4 +100,5 @@ public class For extends Node {
 
         return this;
     }
+
 }

src/main/java/com/sk89q/worldedit/internal/expression/runtime/Function.java

@@ -19,20 +19,19 @@
 
 package com.sk89q.worldedit.internal.expression.runtime;
 
+import com.sk89q.worldedit.internal.expression.Expression;
+import com.sk89q.worldedit.internal.expression.parser.ParserException;
+
 import java.lang.annotation.Retention;
 import java.lang.annotation.RetentionPolicy;
 import java.lang.reflect.InvocationTargetException;
 import java.lang.reflect.Method;
 
-import com.sk89q.worldedit.internal.expression.Expression;
-import com.sk89q.worldedit.internal.expression.parser.ParserException;
-
 /**
- * Wrapper for a Java method and its arguments (other Nodes)
+ * Wrapper for a Java method and its arguments (other Nodes).
- *
- * @author TomyLobo
  */
 public class Function extends Node {
+
     /**
      * Add this annotation on functions that don't always return the same value
      * for the same inputs and on functions with side-effects.
@@ -120,4 +119,5 @@ public class Function extends Node {
 
         return this;
     }
+
 }

src/main/java/com/sk89q/worldedit/internal/expression/runtime/Functions.java

@@ -27,17 +27,16 @@ import java.util.*;
 
 /**
  * Contains all functions that can be used in expressions.
- *
- * @author TomyLobo
  */
 @SuppressWarnings("UnusedDeclaration")
 public final class Functions {
+
     private static class Overload {
         private final Method method;
         private final int mask;
         private final boolean isSetter;
 
-        public Overload(Method method) throws IllegalArgumentException {
+        private Overload(Method method) throws IllegalArgumentException {
             this.method = method;
 
             boolean isSetter = false;
@@ -436,4 +435,5 @@ public final class Functions {
 
         return queryInternal(type, data, typeId, dataValue);
     }
+
 }

src/main/java/com/sk89q/worldedit/internal/expression/runtime/LValue.java

@@ -24,13 +24,15 @@ import com.sk89q.worldedit.internal.expression.parser.ParserException;
 
 /**
  * A value that can be used on the left side of an assignment.
- *
- * @author TomyLobo
  */
 public interface LValue extends RValue {
+
     public double assign(double value) throws EvaluationException;
 
+    @Override
     public LValue optimize() throws EvaluationException;
 
+    @Override
     public LValue bindVariables(Expression expression, boolean preferLValue) throws ParserException;
+
 }

src/main/java/com/sk89q/worldedit/internal/expression/runtime/LValueFunction.java

@@ -19,17 +19,17 @@
 
 package com.sk89q.worldedit.internal.expression.runtime;
 
-import java.lang.reflect.Method;
-
 import com.sk89q.worldedit.internal.expression.Expression;
 import com.sk89q.worldedit.internal.expression.parser.ParserException;
 
+import java.lang.reflect.Method;
+
 /**
- * Wrapper for a pair of Java methods and their arguments (other Nodes), forming an LValue
+ * Wrapper for a pair of Java methods and their arguments (other Nodes),
- *
+ * forming an LValue.
- * @author TomyLobo
  */
 public class LValueFunction extends Function implements LValue {
+
     private final Object[] setterArgs;
     private final Method setter;
 
@@ -73,4 +73,5 @@ public class LValueFunction extends Function implements LValue {
 
         return this;
     }
+
 }

src/main/java/com/sk89q/worldedit/internal/expression/runtime/Node.java

@@ -24,10 +24,9 @@ import com.sk89q.worldedit.internal.expression.parser.ParserException;
 
 /**
  * A node in the execution tree of an expression.
- *
- * @author TomyLobo
  */
 public abstract class Node implements RValue {
+
     private final int position;
 
     public Node(int position) {
@@ -37,6 +36,7 @@ public abstract class Node implements RValue {
     @Override
     public abstract String toString();
 
+    @Override
     public RValue optimize() throws EvaluationException {
         return this;
     }
@@ -50,4 +50,5 @@ public abstract class Node implements RValue {
     public RValue bindVariables(Expression expression, boolean preferLValue) throws ParserException {
         return this;
     }
+
 }

src/main/java/com/sk89q/worldedit/internal/expression/runtime/Operators.java

@@ -21,11 +21,10 @@ package com.sk89q.worldedit.internal.expression.runtime;
 
 /**
  * Contains all unary and binary operators.
- *
- * @author TomyLobo
  */
 @SuppressWarnings("UnusedDeclaration")
 public final class Operators {
+
     private Operators() {
     }
 
@@ -225,4 +224,5 @@ public final class Operators {
         final long longDiff = Math.abs(aLong - bLong);
         return longDiff <= maxUlps;
     }
+
 }

src/main/java/com/sk89q/worldedit/internal/expression/runtime/RValue.java

@@ -25,13 +25,13 @@ import com.sk89q.worldedit.internal.expression.parser.ParserException;
 
 /**
  * A value that can be used on the right side of an assignment.
- *
- * @author TomyLobo
  */
 public interface RValue extends Identifiable {
+
     public double getValue() throws EvaluationException;
 
     public RValue optimize() throws EvaluationException;
 
     public RValue bindVariables(Expression expression, boolean preferLValue) throws ParserException;
+
 }

src/main/java/com/sk89q/worldedit/internal/expression/runtime/Return.java

@@ -24,10 +24,9 @@ import com.sk89q.worldedit.internal.expression.parser.ParserException;
 
 /**
  * A return statement.
- *
- * @author TomyLobo
  */
 public class Return extends Node {
+
     RValue value;
 
     public Return(int position, RValue value) {
@@ -57,4 +56,5 @@ public class Return extends Node {
 
         return this;
     }
+
 }

src/main/java/com/sk89q/worldedit/internal/expression/runtime/ReturnException.java

@@ -21,12 +21,10 @@ package com.sk89q.worldedit.internal.expression.runtime;
 
 /**
  * Thrown when a return statement is encountered.
- * {@link com.sk89q.worldedit.internal.expression.Expression#evaluate} catches this exception and returns the enclosed value.
+ * {@link com.sk89q.worldedit.internal.expression.Expression#evaluate}
- *
+ * catches this exception and returns the enclosed value.
- * @author TomyLobo
  */
 public class ReturnException extends EvaluationException {
-    private static final long serialVersionUID = 1L;
 
     final double value;
 
@@ -39,4 +37,5 @@ public class ReturnException extends EvaluationException {
     public double getValue() {
         return value;
     }
+
 }

src/main/java/com/sk89q/worldedit/internal/expression/runtime/Sequence.java

@@ -19,18 +19,19 @@
 
 package com.sk89q.worldedit.internal.expression.runtime;
 
-import java.util.ArrayList;
-import java.util.List;
-
 import com.sk89q.worldedit.internal.expression.Expression;
 import com.sk89q.worldedit.internal.expression.parser.ParserException;
 
+import java.util.ArrayList;
+import java.util.Collections;
+import java.util.List;
+
 /**
- * A sequence of operations, usually separated by semicolons in the input stream.
+ * A sequence of operations, usually separated by semicolons in the
- *
+ * input stream.
- * @author TomyLobo
  */
 public class Sequence extends Node {
+
     final RValue[] sequence;
 
     public Sequence(int position, RValue... sequence) {
@@ -77,9 +78,7 @@ public class Sequence extends Node {
             droppedLast = null;
             invokable = invokable.optimize();
             if (invokable instanceof Sequence) {
-                for (RValue subInvokable : ((Sequence) invokable).sequence) {
+                Collections.addAll(newSequence, ((Sequence) invokable).sequence);
-                    newSequence.add(subInvokable);
-                }
             } else if (invokable instanceof Constant) {
                 droppedLast = invokable;
             } else {
@@ -106,4 +105,5 @@ public class Sequence extends Node {
 
         return this;
     }
+
 }

src/main/java/com/sk89q/worldedit/internal/expression/runtime/SimpleFor.java

@@ -24,10 +24,9 @@ import com.sk89q.worldedit.internal.expression.parser.ParserException;
 
 /**
  * A simple-style for loop.
- *
- * @author TomyLobo
  */
 public class SimpleFor extends Node {
+
     LValue counter;
     RValue first;
     RValue last;
@@ -98,4 +97,5 @@ public class SimpleFor extends Node {
 
         return this;
     }
+
 }

src/main/java/com/sk89q/worldedit/internal/expression/runtime/Switch.java

@@ -19,6 +19,9 @@
 
 package com.sk89q.worldedit.internal.expression.runtime;
 
+import com.sk89q.worldedit.internal.expression.Expression;
+import com.sk89q.worldedit.internal.expression.parser.ParserException;
+
 import java.util.ArrayList;
 import java.util.Collections;
 import java.util.HashMap;
@@ -26,15 +29,11 @@ import java.util.List;
 import java.util.Map;
 import java.util.Map.Entry;
 
-import com.sk89q.worldedit.internal.expression.Expression;
-import com.sk89q.worldedit.internal.expression.parser.ParserException;
-
 /**
  * A switch/case construct.
- *
- * @author TomyLobo
  */
 public class Switch extends Node implements RValue {
+
     private RValue parameter;
     private final Map<Double, Integer> valueMap;
     private final RValue[] caseStatements;
@@ -205,4 +204,5 @@ public class Switch extends Node implements RValue {
 
         return this;
     }
+
 }

src/main/java/com/sk89q/worldedit/internal/expression/runtime/Variable.java

@@ -24,10 +24,9 @@ import com.sk89q.worldedit.internal.expression.parser.ParserException;
 
 /**
  * A variable.
- *
- * @author TomyLobo
  */
 public final class Variable extends Node implements LValue {
+
     public double value;
 
     public Variable(double value) {
@@ -64,4 +63,5 @@ public final class Variable extends Node implements LValue {
     public LValue bindVariables(Expression expression, boolean preferLValue) throws ParserException {
         return this;
     }
+
 }

src/main/java/com/sk89q/worldedit/internal/expression/runtime/While.java

@@ -24,10 +24,9 @@ import com.sk89q.worldedit.internal.expression.parser.ParserException;
 
 /**
  * A while loop.
- *
- * @author TomyLobo
  */
 public class While extends Node {
+
     RValue condition;
     RValue body;
     boolean footChecked;
@@ -124,4 +123,5 @@ public class While extends Node {
 
         return this;
     }
+
 }

src/main/java/com/sk89q/worldedit/internal/util/DocumentationPrinter.java

@@ -33,7 +33,9 @@ import java.util.ArrayList;
 import java.util.Arrays;
 import java.util.List;
 
+@SuppressWarnings("UseOfSystemOutOrSystemErr")
 public final class DocumentationPrinter {
+
     private DocumentationPrinter() {
     }
 
@@ -191,7 +193,6 @@ public final class DocumentationPrinter {
     }
 
     private static void writeBukkitYAML(PrintStream stream) {
-
         stream.println("name: WorldEdit");
         stream.println("main: com.sk89q.worldedit.bukkit.WorldEditPlugin");
         stream.println("version: ${project.version}");
@@ -202,4 +203,5 @@ public final class DocumentationPrinter {
         stream.println("# Permissions aren't here. Read http://wiki.sk89q.com/wiki/WEPIF/DinnerPerms");
         stream.println("# for how WorldEdit permissions actually work.");
     }
+
 }

src/main/java/com/sk89q/worldedit/math/MathUtils.java

@@ -26,10 +26,10 @@ public final class MathUtils {
 
     /**
      * Safe minimum, such that 1 / SAFE_MIN does not overflow.
-     * <p>
+     *
-     * In IEEE 754 arithmetic, this is also the smallest normalized number
+     * <p>In IEEE 754 arithmetic, this is also the smallest normalized number
      * 2<sup>-1022</sup>. The value of this constant is from Apache Commons
-     * Math 2.2.
+     * Math 2.2.</p>
      */
     public static final double SAFE_MIN = 0x1.0p-1022;
 

src/main/java/com/sk89q/worldedit/math/convolution/GaussianKernel.java

@@ -22,11 +22,8 @@ package com.sk89q.worldedit.math.convolution;
 import java.awt.image.Kernel;
 
 /**
- * A Gaussian Kernel generator (2D bellcurve)
+ * A Gaussian Kernel generator (2D bellcurve).
- * 
- * @author Grum
  */
-
 public class GaussianKernel extends Kernel {
 
     /**
@@ -35,7 +32,6 @@ public class GaussianKernel extends Kernel {
      * @param radius the resulting diameter will be radius * 2 + 1
      * @param sigma controls 'flatness'
      */
-
     public GaussianKernel(int radius, double sigma) {
         super(radius * 2 + 1, radius * 2 + 1, createKernel(radius, sigma));
     }
@@ -54,4 +50,5 @@ public class GaussianKernel extends Kernel {
 
         return data;
     }
+
 }

src/main/java/com/sk89q/worldedit/math/convolution/HeightMap.java

@@ -26,14 +26,15 @@ import com.sk89q.worldedit.blocks.BaseBlock;
 import com.sk89q.worldedit.blocks.BlockID;
 import com.sk89q.worldedit.regions.Region;
 
-/**
+import static com.google.common.base.Preconditions.checkNotNull;
- * Allows applications of Kernels onto the region's heightmap.
- * Currently only used for smoothing (with a GaussianKernel).
- * 
- * @author Grum
- */
 
+/**
+ * Allows applications of Kernels onto the region's height map.
+ *
+ * <p>Currently only used for smoothing (with a GaussianKernel)</p>.
+ */
 public class HeightMap {
+
     private int[] data;
     private int width;
     private int height;
@@ -44,8 +45,8 @@ public class HeightMap {
     /**
      * Constructs the HeightMap
      * 
-     * @param session
+     * @param session an edit session
-     * @param region
+     * @param region the region
      */
     public HeightMap(EditSession session, Region region) {
         this(session, region, false);
@@ -54,11 +55,14 @@ public class HeightMap {
     /**
      * Constructs the HeightMap
      *
-     * @param session
+     * @param session an edit session
-     * @param region
+     * @param region the region
      * @param naturalOnly ignore non-natural blocks
      */
     public HeightMap(EditSession session, Region region, boolean naturalOnly) {
+        checkNotNull(session);
+        checkNotNull(region);
+
         this.session = session;
         this.region = region;
 
@@ -82,13 +86,15 @@ public class HeightMap {
     /**
      * Apply the filter 'iterations' amount times.
      * 
-     * @param filter
+     * @param filter the filter
-     * @param iterations
+     * @param iterations the number of iterations
      * @return number of blocks affected
      * @throws MaxChangedBlocksException
      */
 
     public int applyFilter(HeightMapFilter filter, int iterations) throws MaxChangedBlocksException {
+        checkNotNull(filter);
+
         int[] newData = new int[data.length];
         System.arraycopy(data, 0, newData, 0, data.length);
 
@@ -102,12 +108,14 @@ public class HeightMap {
     /**
      * Apply a raw heightmap to the region
      * 
-     * @param data
+     * @param data the data
      * @return number of blocks affected
      * @throws MaxChangedBlocksException
      */
 
     public int apply(int[] data) throws MaxChangedBlocksException {
+        checkNotNull(data);
+
         Vector minY = region.getMinimumPoint();
         int originX = minY.getBlockX();
         int originY = minY.getBlockY();
@@ -178,4 +186,5 @@ public class HeightMap {
 
         return blocksChanged;
     }
+
 }

src/main/java/com/sk89q/worldedit/math/convolution/HeightMapFilter.java

@@ -21,33 +21,36 @@ package com.sk89q.worldedit.math.convolution;
 
 import java.awt.image.Kernel;
 
-/**
+import static com.google.common.base.Preconditions.checkNotNull;
- * Allows applications of Kernels onto the region's heightmap.
- * Only used for smoothing (with a GaussianKernel).
- * 
- * @author Grum
- */
 
+/**
+ * Allows applications of Kernels onto the region's height map.
+ *
+ * <p>Only used for smoothing (with a GaussianKernel).</p>
+ */
 public class HeightMapFilter {
+
     private Kernel kernel;
 
     /**
      * Construct the HeightMapFilter object.
      * 
-     * @param kernel
+     * @param kernel the kernel
      */
     public HeightMapFilter(Kernel kernel) {
+        checkNotNull(kernel);
         this.kernel = kernel;
     }
 
     /**
      * Construct the HeightMapFilter object.
      * 
-     * @param kernelWidth
+     * @param kernelWidth the width
-     * @param kernelHeight
+     * @param kernelHeight the height
-     * @param kernelData
+     * @param kernelData the data
      */
     public HeightMapFilter(int kernelWidth, int kernelHeight, float[] kernelData) {
+        checkNotNull(kernelData);
         this.kernel = new Kernel(kernelWidth, kernelHeight, kernelData);
     }
 
@@ -61,21 +64,26 @@ public class HeightMapFilter {
     /**
      * Set Kernel
      * 
-     * @param kernel
+     * @param kernel the kernel
      */
     public void setKernel(Kernel kernel) {
+        checkNotNull(kernel);
+
         this.kernel = kernel;
     }
 
     /**
      * Filter with a 2D kernel
      *
-     * @param inData
+     * @param inData the data
-     * @param width
+     * @param width the width
-     * @param height
+     * @param height the height
-     * @return the modified heightmap
+     *
+     * @return the modified height map
      */
     public int[] filter(int[] inData, int width, int height) {
+        checkNotNull(inData);
+
         int index = 0;
         float[] matrix = kernel.getKernelData(null);
         int[] outData = new int[inData.length];
@@ -117,4 +125,5 @@ public class HeightMapFilter {
         }
         return outData;
     }
+
 }

src/main/java/com/sk89q/worldedit/math/convolution/LinearKernel.java

@@ -23,10 +23,7 @@ import java.awt.image.Kernel;
 
 /**
  * A linear Kernel generator (all cells weight the same)
- * 
- * @author Grum
  */
-
 public class LinearKernel extends Kernel {
 
     public LinearKernel(int radius) {
@@ -37,8 +34,9 @@ public class LinearKernel extends Kernel {
         int diameter = radius * 2 + 1;
         float[] data = new float[diameter * diameter];
 
-        for (int i = 0; i < data.length; data[i++] = 1.0f / data.length) ;
+        for (int i = 0; i < data.length; data[i++] = 1.0f / data.length);
 
         return data;
     }
+
 }