[Bleeding] Changed event system into a new, much faster design. Huge thanks to @zml2008 & @lahwran.

src/main/java/org/bukkit/event/weather/WeatherChangeEvent.java

@@ -2,12 +2,14 @@ package org.bukkit.event.weather;
 
 import org.bukkit.World;
 import org.bukkit.event.Cancellable;
+import org.bukkit.event.HandlerList;
 
 /**
  * Stores data for weather changing in a world
  */
 @SuppressWarnings("serial")
 public class WeatherChangeEvent extends WeatherEvent implements Cancellable {
+    private static final HandlerList handlers = new HandlerList();
 
     private boolean canceled;
     private boolean to;
@@ -33,4 +35,13 @@ public class WeatherChangeEvent extends WeatherEvent implements Cancellable {
     public boolean toWeatherState() {
         return to;
     }
+
+    @Override
+    public HandlerList getHandlers() {
+        return handlers;
+    }
+
+    public static HandlerList getHandlerList() {
+        return handlers;
+    }
 }