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

By: Nathan Adams <dinnerbone@dinnerbone.com>

paper-api/src/main/java/org/bukkit/event/weather/LightningStrikeEvent.java

@@ -3,12 +3,14 @@ package org.bukkit.event.weather;
 import org.bukkit.World;
 import org.bukkit.entity.LightningStrike;
 import org.bukkit.event.Cancellable;
+import org.bukkit.event.HandlerList;
 
 /**
  * Stores data for lightning striking
  */
 @SuppressWarnings("serial")
 public class LightningStrikeEvent extends WeatherEvent implements Cancellable {
+    private static final HandlerList handlers = new HandlerList();
 
     private boolean canceled;
     private LightningStrike bolt;
@@ -34,4 +36,13 @@ public class LightningStrikeEvent extends WeatherEvent implements Cancellable {
     public LightningStrike getLightning() {
         return bolt;
     }
+
+    @Override
+    public HandlerList getHandlers() {
+        return handlers;
+    }
+
+    public static HandlerList getHandlerList() {
+        return handlers;
+    }
 }

paper-api/src/main/java/org/bukkit/event/weather/ThunderChangeEvent.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 thunder state changing in a world
  */
 @SuppressWarnings("serial")
 public class ThunderChangeEvent extends WeatherEvent implements Cancellable {
+    private static final HandlerList handlers = new HandlerList();
 
     private boolean canceled;
     private boolean to;
@@ -33,4 +35,13 @@ public class ThunderChangeEvent extends WeatherEvent implements Cancellable {
     public boolean toThunderState() {
         return to;
     }
+
+    @Override
+    public HandlerList getHandlers() {
+        return handlers;
+    }
+
+    public static HandlerList getHandlerList() {
+        return handlers;
+    }
 }

paper-api/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;
+    }
 }

paper-api/src/main/java/org/bukkit/event/weather/WeatherEvent.java

@@ -7,7 +7,7 @@ import org.bukkit.event.Event;
  * Represents a Weather-related event
  */
 @SuppressWarnings("serial")
-public class WeatherEvent extends Event {
+public abstract class WeatherEvent extends Event {
     protected World world;
 
     public WeatherEvent(final Event.Type type, final World where) {

paper-api/src/main/java/org/bukkit/event/weather/WeatherListener.java

@@ -5,6 +5,7 @@ import org.bukkit.event.Listener;
 /**
  * Handles all events fired in relation to weather
  */
+@Deprecated
 public class WeatherListener implements Listener {
     public WeatherListener() {}