diff --git a/src/main/java/io/github/paldiu/simplexcore/SimplexCore.java b/src/main/java/io/github/paldiu/simplexcore/SimplexCore.java
index a16f4a1..3b394a9 100644
--- a/src/main/java/io/github/paldiu/simplexcore/SimplexCore.java
+++ b/src/main/java/io/github/paldiu/simplexcore/SimplexCore.java
@@ -1,8 +1,8 @@
 package io.github.paldiu.simplexcore;
 
 import io.github.paldiu.simplexcore.command.defaults.Command_info;
-import io.github.paldiu.simplexcore.future.Announcer;
-import io.github.paldiu.simplexcore.listener.ServerPluginListener;
+import io.github.paldiu.simplexcore.concurrent.Announcer;
+import io.github.paldiu.simplexcore.listener.DependencyListener;
 import io.github.paldiu.simplexcore.listener.SimplexListener;
 import io.github.paldiu.simplexcore.plugin.SimplexAddon;
 import io.github.paldiu.simplexcore.utils.Constants;
@@ -35,7 +35,7 @@ public final class SimplexCore extends SimplexAddon<SimplexCore> {
             Constants.getCommandLoader().classpath(Command_info.class).load();
             Constants.getConfig().reload();
             //
-            SimplexListener.register(new ServerPluginListener(), this);
+            SimplexListener.register(new DependencyListener(), this);
             new Announcer();
         } catch (Exception ex) {
             suspended = true;
diff --git a/src/main/java/io/github/paldiu/simplexcore/ban/Ban.java b/src/main/java/io/github/paldiu/simplexcore/ban/Ban.java
index 729db59..2a490bb 100644
--- a/src/main/java/io/github/paldiu/simplexcore/ban/Ban.java
+++ b/src/main/java/io/github/paldiu/simplexcore/ban/Ban.java
@@ -58,7 +58,7 @@ public abstract class Ban implements IBan {
         if (separateFiles) {
             Yaml yaml = new YamlFactory(Constants.getPlugin()).from(null, fileLocation, player.getName() + ".yml");
             yaml.getConfig().createSection(getOffender().toString());
-            ConfigurationSection section = yaml.getConfigurationSection(getOffender().toString());
+            ConfigurationSection section = yaml.getConfigurationSection(getOffender()::toString);
             section.set("name", player.getName());
             section.set("ban_id", banId);
             section.set("sender", sender.getName());
@@ -74,6 +74,7 @@ public abstract class Ban implements IBan {
             yaml.reload();
         } else {
             // TODO: Write to a single file as separate sections per UUID.
+            Yaml yaml = new YamlFactory(Constants.getPlugin()).from(null, fileLocation, "bans.yml");
         }
     }
 }
diff --git a/src/main/java/io/github/paldiu/simplexcore/future/Announcer.java b/src/main/java/io/github/paldiu/simplexcore/concurrent/Announcer.java
similarity index 94%
rename from src/main/java/io/github/paldiu/simplexcore/future/Announcer.java
rename to src/main/java/io/github/paldiu/simplexcore/concurrent/Announcer.java
index 0955332..994c587 100644
--- a/src/main/java/io/github/paldiu/simplexcore/future/Announcer.java
+++ b/src/main/java/io/github/paldiu/simplexcore/concurrent/Announcer.java
@@ -1,4 +1,4 @@
-package io.github.paldiu.simplexcore.future;
+package io.github.paldiu.simplexcore.concurrent;
 
 import io.github.paldiu.simplexcore.chat.Messages;
 import io.github.paldiu.simplexcore.utils.Constants;
diff --git a/src/main/java/io/github/paldiu/simplexcore/future/SimplexTask.java b/src/main/java/io/github/paldiu/simplexcore/concurrent/SimplexTask.java
similarity index 97%
rename from src/main/java/io/github/paldiu/simplexcore/future/SimplexTask.java
rename to src/main/java/io/github/paldiu/simplexcore/concurrent/SimplexTask.java
index 8963614..2f234a3 100644
--- a/src/main/java/io/github/paldiu/simplexcore/future/SimplexTask.java
+++ b/src/main/java/io/github/paldiu/simplexcore/concurrent/SimplexTask.java
@@ -1,4 +1,4 @@
-package io.github.paldiu.simplexcore.future;
+package io.github.paldiu.simplexcore.concurrent;
 
 import io.github.paldiu.simplexcore.plugin.SimplexAddon;
 import io.github.paldiu.simplexcore.utils.Constants;
diff --git a/src/main/java/io/github/paldiu/simplexcore/config/IConfig.java b/src/main/java/io/github/paldiu/simplexcore/config/IConfig.java
new file mode 100644
index 0000000..04aa275
--- /dev/null
+++ b/src/main/java/io/github/paldiu/simplexcore/config/IConfig.java
@@ -0,0 +1,41 @@
+package io.github.paldiu.simplexcore.config;
+
+import org.bukkit.configuration.ConfigurationSection;
+
+import java.util.List;
+
+public interface IConfig {
+    void set(Path path, Object value);
+
+    boolean contains(Path path);
+
+    ConfigurationSection getConfigurationSection(Path path);
+
+    List<String> getStringList(Path path);
+
+    long getLong(Path path);
+
+    List<?> getList(Path path);
+
+    boolean getBoolean(Path path);
+
+    int getInt(Path path);
+
+    double getDouble(Path path);
+
+    String getString(Path path);
+
+    long getLong(Path path, long def);
+
+    List<?> getList(Path path, List<?> def);
+
+    boolean getBoolean(Path path, boolean def);
+
+    int getInt(Path path, int def);
+
+    double getDouble(Path path, double def);
+
+    String getString(Path path, String def);
+
+    Object get(Path path, Object def);
+}
diff --git a/src/main/java/io/github/paldiu/simplexcore/config/Json.java b/src/main/java/io/github/paldiu/simplexcore/config/Json.java
index 6a2944c..658ccf1 100644
--- a/src/main/java/io/github/paldiu/simplexcore/config/Json.java
+++ b/src/main/java/io/github/paldiu/simplexcore/config/Json.java
@@ -1,5 +1,94 @@
 package io.github.paldiu.simplexcore.config;
 
-public class Json {
+import org.bukkit.configuration.ConfigurationSection;
+
+import java.util.List;
+
+public class Json implements IConfig {
     // TODO: Write actual JSON implementations.
+
+    @Override
+    public void set(Path path, Object value) {
+
+    }
+
+    @Override
+    public boolean contains(Path path) {
+        return false;
+    }
+
+    @Override
+    public ConfigurationSection getConfigurationSection(Path path) {
+        return null;
+    }
+
+    @Override
+    public List<String> getStringList(Path path) {
+        return null;
+    }
+
+    @Override
+    public long getLong(Path path) {
+        return 0;
+    }
+
+    @Override
+    public List<?> getList(Path path) {
+        return null;
+    }
+
+    @Override
+    public boolean getBoolean(Path path) {
+        return false;
+    }
+
+    @Override
+    public int getInt(Path path) {
+        return 0;
+    }
+
+    @Override
+    public double getDouble(Path path) {
+        return 0;
+    }
+
+    @Override
+    public String getString(Path path) {
+        return null;
+    }
+
+    @Override
+    public long getLong(Path path, long def) {
+        return 0;
+    }
+
+    @Override
+    public List<?> getList(Path path, List<?> def) {
+        return null;
+    }
+
+    @Override
+    public boolean getBoolean(Path path, boolean def) {
+        return false;
+    }
+
+    @Override
+    public int getInt(Path path, int def) {
+        return 0;
+    }
+
+    @Override
+    public double getDouble(Path path, double def) {
+        return 0;
+    }
+
+    @Override
+    public String getString(Path path, String def) {
+        return null;
+    }
+
+    @Override
+    public Object get(Path path, Object def) {
+        return null;
+    }
 }
diff --git a/src/main/java/io/github/paldiu/simplexcore/config/Path.java b/src/main/java/io/github/paldiu/simplexcore/config/Path.java
new file mode 100644
index 0000000..ea08ec1
--- /dev/null
+++ b/src/main/java/io/github/paldiu/simplexcore/config/Path.java
@@ -0,0 +1,6 @@
+package io.github.paldiu.simplexcore.config;
+
+@FunctionalInterface
+public interface Path {
+    String getPath();
+}
diff --git a/src/main/java/io/github/paldiu/simplexcore/config/Yaml.java b/src/main/java/io/github/paldiu/simplexcore/config/Yaml.java
index 56aacef..329360f 100644
--- a/src/main/java/io/github/paldiu/simplexcore/config/Yaml.java
+++ b/src/main/java/io/github/paldiu/simplexcore/config/Yaml.java
@@ -14,7 +14,7 @@ import java.io.IOException;
 import java.nio.file.NotDirectoryException;
 import java.util.List;
 
-public final class Yaml {
+public final class Yaml implements IConfig {
     private final SimplexAddon<?> plugin;
     private final String fileName;
     private final File directory;
@@ -37,72 +37,73 @@ public final class Yaml {
         this.resourcePath = resourcePath;
     }
 
-    public final void set(String path, Object value) {
-        this.getConfig().set(path, value);
+    @Override
+    public final void set(Path path, Object value) {
+        this.getConfig().set(path.getPath(), value);
     }
 
-    public boolean contains(String path) {
-        return this.getConfig().contains(path);
+    public boolean contains(Path path) {
+        return this.getConfig().contains(path.getPath());
     }
 
-    public ConfigurationSection getConfigurationSection(String path) {
-        return this.getConfig().getConfigurationSection(path);
+    public ConfigurationSection getConfigurationSection(Path path) {
+        return this.getConfig().getConfigurationSection(path.getPath());
     }
 
-    public List<String> getStringList(String path) {
-        return this.getConfig().getStringList(path);
+    public List<String> getStringList(Path path) {
+        return this.getConfig().getStringList(path.getPath());
     }
 
-    public long getLong(String path) {
-        return this.getConfig().getLong(path);
+    public long getLong(Path path) {
+        return this.getConfig().getLong(path.getPath());
     }
 
-    public List<?> getList(String path) {
-        return this.getConfig().getList(path);
+    public List<?> getList(Path path) {
+        return this.getConfig().getList(path.getPath());
     }
 
-    public boolean getBoolean(String path) {
-        return this.getConfig().getBoolean(path);
+    public boolean getBoolean(Path path) {
+        return this.getConfig().getBoolean(path.getPath());
     }
 
-    public int getInt(String path) {
-        return this.getConfig().getInt(path);
+    public int getInt(Path path) {
+        return this.getConfig().getInt(path.getPath());
     }
 
-    public double getDouble(String path) {
-        return this.getConfig().getDouble(path);
+    public double getDouble(Path path) {
+        return this.getConfig().getDouble(path.getPath());
     }
 
-    public String getString(String path) {
-        return this.getConfig().getString(path);
+    public String getString(Path path) {
+        return this.getConfig().getString(path.getPath());
     }
 
-    public long getLong(String path, long def) {
-        return this.getConfig().getLong(path, def);
+    public long getLong(Path path, long def) {
+        return this.getConfig().getLong(path.getPath(), def);
     }
 
-    public List<?> getList(String path, List<?> def) {
-        return this.getConfig().getList(path, def);
+    public List<?> getList(Path path, List<?> def) {
+        return this.getConfig().getList(path.getPath(), def);
     }
 
-    public boolean getBoolean(String path, boolean def) {
-        return this.getConfig().getBoolean(path, def);
+    public boolean getBoolean(Path path, boolean def) {
+        return this.getConfig().getBoolean(path.getPath(), def);
     }
 
-    public int getInt(String path, int def) {
-        return this.getConfig().getInt(path, def);
+    public int getInt(Path path, int def) {
+        return this.getConfig().getInt(path.getPath(), def);
     }
 
-    public double getDouble(String path, double def) {
-        return this.getConfig().getDouble(path, def);
+    public double getDouble(Path path, double def) {
+        return this.getConfig().getDouble(path.getPath(), def);
     }
 
-    public String getString(String path, String def) {
-        return this.getConfig().getString(path, def);
+    public String getString(Path path, String def) {
+        return this.getConfig().getString(path.getPath(), def);
     }
 
-    public Object get(String path, Object def) {
-        return this.getConfig().get(path, def);
+    public Object get(Path path, Object def) {
+        return this.getConfig().get(path.getPath(), def);
     }
 
     public final void reload() {
@@ -115,6 +116,7 @@ public final class Yaml {
                 }
             }
         } else { // Directory doesn't exist.
+            //noinspection ResultOfMethodCallIgnored
             this.directory.mkdir(); // Make directory
         }
         this.file = new File(this.directory, this.fileName);
diff --git a/src/main/java/io/github/paldiu/simplexcore/listener/ServerPluginListener.java b/src/main/java/io/github/paldiu/simplexcore/listener/DependencyListener.java
similarity index 95%
rename from src/main/java/io/github/paldiu/simplexcore/listener/ServerPluginListener.java
rename to src/main/java/io/github/paldiu/simplexcore/listener/DependencyListener.java
index 7a68fc8..052b6da 100644
--- a/src/main/java/io/github/paldiu/simplexcore/listener/ServerPluginListener.java
+++ b/src/main/java/io/github/paldiu/simplexcore/listener/DependencyListener.java
@@ -9,7 +9,7 @@ import org.bukkit.event.server.PluginEnableEvent;
 import java.util.ArrayList;
 import java.util.List;
 
-public final class ServerPluginListener extends SimplexListener {
+public final class DependencyListener extends SimplexListener {
     public List<String> PAPI_NAMES = new ArrayList<>() {{
         add("PlaceholderAPI");
         add("PlaceHolderAPI");
diff --git a/src/main/java/io/github/paldiu/simplexcore/particle/IParticleEffect.java b/src/main/java/io/github/paldiu/simplexcore/particle/IParticleEffect.java
new file mode 100644
index 0000000..87af799
--- /dev/null
+++ b/src/main/java/io/github/paldiu/simplexcore/particle/IParticleEffect.java
@@ -0,0 +1,14 @@
+package io.github.paldiu.simplexcore.particle;
+
+import org.bukkit.Color;
+import org.bukkit.Particle;
+
+public interface IParticleEffect {
+    Particle[] getParticles();
+
+    Color[] getParticleColors();
+
+    Float getSize();
+
+    Long getDuration();
+}
diff --git a/src/main/java/io/github/paldiu/simplexcore/sign/IUsableSign.java b/src/main/java/io/github/paldiu/simplexcore/sign/IUsableSign.java
new file mode 100644
index 0000000..0523067
--- /dev/null
+++ b/src/main/java/io/github/paldiu/simplexcore/sign/IUsableSign.java
@@ -0,0 +1,17 @@
+package io.github.paldiu.simplexcore.sign;
+
+import org.bukkit.Location;
+import org.bukkit.World;
+import org.bukkit.block.Block;
+
+public interface IUsableSign {
+    Block getBlock();
+
+    Location getSignLocation();
+
+    World getWorld();
+
+    String getSignText();
+
+    void executeOnInteract();
+}
diff --git a/src/main/java/io/github/paldiu/simplexcore/structures/IStructure.java b/src/main/java/io/github/paldiu/simplexcore/structures/IStructure.java
new file mode 100644
index 0000000..fb32415
--- /dev/null
+++ b/src/main/java/io/github/paldiu/simplexcore/structures/IStructure.java
@@ -0,0 +1,29 @@
+package io.github.paldiu.simplexcore.structures;
+
+import io.github.paldiu.simplexcore.math.Size;
+import org.bukkit.Location;
+import org.bukkit.NamespacedKey;
+import org.bukkit.World;
+import org.bukkit.block.Block;
+
+public interface IStructure {
+    NamespacedKey getNamespacedKey();
+
+    String getName();
+
+    int getId();
+
+    Location getLocation();
+
+    World getWorld();
+
+    boolean shouldGenerateNaturally();
+
+    void generate(Location location, World world);
+
+    void generate(Location location, World world, boolean generateNaturally);
+
+    Size getApproximateSize();
+
+    Block[] getBlocks();
+}
diff --git a/src/main/java/io/github/paldiu/simplexcore/structures/Structure.java b/src/main/java/io/github/paldiu/simplexcore/structures/Structure.java
new file mode 100644
index 0000000..a101a7c
--- /dev/null
+++ b/src/main/java/io/github/paldiu/simplexcore/structures/Structure.java
@@ -0,0 +1,5 @@
+package io.github.paldiu.simplexcore.structures;
+
+public class Structure {
+    // TODO: Write this file to parse schematics.
+}