Some edits

src/main/java/io/github/paldiu/simplexcore/command/CommandLoader.java

@@ -17,7 +17,7 @@ import java.util.Arrays;
 import java.util.Map;
 import java.util.MissingResourceException;
 
-public class CommandLoader {
+public final class CommandLoader {
     private Reflections reflections;
 
     public synchronized CommandLoader classpath(Class<?> clazz) {

src/main/java/io/github/paldiu/simplexcore/command/defaults/DefaultCommand.java

@@ -7,7 +7,7 @@ import org.bukkit.command.CommandSender;
 import org.jetbrains.annotations.NotNull;
 
 @CommandInfo(name = "defaultcommand", usage = "/<command>", description = "Default plugin command.")
-public class DefaultCommand extends SimplexCommand {
+public final class DefaultCommand extends SimplexCommand {
     @Override
     public boolean onCommand(@NotNull CommandSender sender, @NotNull Command command, @NotNull String label, @NotNull String[] args) {
         sender.sendMessage("If you are seeing this when running your command, your command didn't register properly.");

src/main/java/io/github/paldiu/simplexcore/listener/ServerPluginListener.java

@@ -5,7 +5,7 @@ import io.github.paldiu.simplexcore.utils.Constants;
 import org.bukkit.event.EventHandler;
 import org.bukkit.event.server.PluginEnableEvent;
 
-public class ServerPluginListener extends SimplexListener {
+public final class ServerPluginListener extends SimplexListener {
     @EventHandler
     public void pluginRegister(PluginEnableEvent event) {
         if (SimplexAddon.class.isAssignableFrom(event.getPlugin().getClass())) {

src/main/java/io/github/paldiu/simplexcore/math/Cuboid.java

@@ -7,7 +7,7 @@ import org.bukkit.scheduler.BukkitTask;
 
 import java.util.function.Consumer;
 
-public class Cuboid {
+public final class Cuboid {
     private final int x, y, z;
 
     public Cuboid() {

src/main/java/io/github/paldiu/simplexcore/plugin/AddonManager.java

@@ -2,7 +2,7 @@ package io.github.paldiu.simplexcore.plugin;
 
 import io.github.paldiu.simplexcore.utils.Constants;
 
-public class AddonManager {
+public final class AddonManager {
     public AddonManager() { }
 
     public void disable(SimplexAddon<?> simplexAddon) {

src/main/java/io/github/paldiu/simplexcore/plugin/AddonRegistry.java

@@ -3,7 +3,7 @@ package io.github.paldiu.simplexcore.plugin;
 import java.util.HashSet;
 import java.util.Set;
 
-public class AddonRegistry {
+public final class AddonRegistry {
     private final Set<SimplexAddon<?>> components = new HashSet<>();
     private static final AddonRegistry instance = new AddonRegistry();
 

src/main/java/io/github/paldiu/simplexcore/utils/Bean.java

@@ -1,17 +1,43 @@
 package io.github.paldiu.simplexcore.utils;
 
-public class Bean<T> {
+import org.apache.commons.lang.builder.EqualsBuilder;
+import org.apache.commons.lang.builder.HashCodeBuilder;
+
+public final class Bean<T> {
     protected T bean;
 
     public Bean(T bean) {
         this.bean = bean;
     }
 
-    public void setBean(T bean) {
+    public void set(T bean) {
         this.bean = bean;
     }
 
-    public T getBean() {
+    public T get() {
         return bean;
     }
+
+    @Override
+    public int hashCode() {
+        return new HashCodeBuilder().append(get()).toHashCode();
+    }
+
+    @Override
+    public boolean equals(Object obj) {
+        if (!(obj instanceof Bean<?>)) {
+            return false;
+        }
+
+        if (obj == this) {
+            return true;
+        }
+
+        return new EqualsBuilder().append(((Bean<?>) obj).get(), get()).isEquals();
+    }
+
+    @Override
+    public String toString() {
+        return get().toString();
+    }
 }

src/main/java/io/github/paldiu/simplexcore/utils/Trio.java

@@ -3,7 +3,7 @@ package io.github.paldiu.simplexcore.utils;
 import org.apache.commons.lang.builder.EqualsBuilder;
 import org.apache.commons.lang.builder.HashCodeBuilder;
 
-public class Trio<A, B, C> {
+public final class Trio<A, B, C> {
     private final A primary;
     private final B secondary;
     private final C tertiary;

src/main/java/io/github/paldiu/simplexcore/utils/Utilities.java

@@ -12,7 +12,7 @@ import java.util.function.Consumer;
 import java.util.stream.Collectors;
 import java.util.stream.Stream;
 
-public class Utilities {
+public final class Utilities {
     private static <T> Stream<T> feStr(T[] array) {
         return Arrays.stream(array);
     }