Events should be present tense, not paste tense.

src/main/java/org/bukkit/event/world/ChunkLoadEvent.java

@@ -6,10 +6,10 @@ import org.bukkit.Chunk;
 /**
  * Called when a chunk is loaded
  */
-public class ChunkLoadedEvent extends WorldEvent {
+public class ChunkLoadEvent extends WorldEvent {
     private final Chunk chunk;
 
-    public ChunkLoadedEvent(final Type type, final Chunk chunk) {
+    public ChunkLoadEvent(final Type type, final Chunk chunk) {
         super(type, chunk.getWorld());
 
         this.chunk = chunk;

src/main/java/org/bukkit/event/world/ChunkUnloadEvent.java

@@ -7,10 +7,10 @@ import org.bukkit.event.Cancellable;
 /**
  * Called when a chunk is unloaded
  */
-public class ChunkUnloadedEvent extends ChunkLoadedEvent implements Cancellable {
+public class ChunkUnloadEvent extends ChunkLoadEvent implements Cancellable {
     private boolean cancel = false;
 
-    public ChunkUnloadedEvent(final Type type, final Chunk chunk) {
+    public ChunkUnloadEvent(final Type type, final Chunk chunk) {
         super(type, chunk);
     }
 

src/main/java/org/bukkit/event/world/WorldListener.java

@@ -12,7 +12,7 @@ public class WorldListener implements Listener {
      *
      * @param event Relevant event details
      */
-    public void onChunkLoaded(ChunkLoadedEvent event) {
+    public void onChunkLoaded(ChunkLoadEvent event) {
     }
 
     /**
@@ -20,6 +20,6 @@ public class WorldListener implements Listener {
      *
      * @param event Relevant event details
      */
-    public void onChunkUnloaded(ChunkUnloadedEvent event) {
+    public void onChunkUnloaded(ChunkUnloadEvent event) {
     }
 }