Added a lot of events relating to weather, including those for entities. Thanks wizjany!

src/main/java/org/bukkit/event/entity/CreeperPowerEvent.java

@@ -0,0 +1,89 @@
+package org.bukkit.event.entity;
+
+import org.bukkit.entity.Entity;
+import org.bukkit.event.Cancellable;
+
+/**
+ * Stores data for creepers being (un)powered
+ */
+public class CreeperPowerEvent extends EntityEvent implements Cancellable {
+
+    private boolean canceled;
+    private Entity creeper;
+    private PowerCause cause;
+    private Entity bolt;
+
+    public CreeperPowerEvent(Entity creeper, Entity bolt, PowerCause cause) {
+        super(Type.CREEPER_POWER, creeper);
+        this.creeper = creeper;
+        this.bolt = bolt;
+        this.cause = cause;
+    }
+
+    public CreeperPowerEvent(Entity creeper, PowerCause cause) {
+        super(Type.CREEPER_POWER, creeper);
+        this.creeper = creeper;
+        this.cause = cause;
+        this.bolt = null;
+    }
+
+    /**
+     * Gets the cancellation state of this event. A canceled event will not
+     * be executed in the server, but will still pass to other plugins
+     *
+     * @return true if this event is canceled
+     */
+    public boolean isCancelled() {
+        return canceled;
+    }
+
+    /**
+     * Sets the cancellation state of this event. A canceled event will not
+     * be executed in the server, but will still pass to other plugins
+     *
+     * @param cancel true if you wish to cancel this event
+     */
+    public void setCancelled(boolean cancel) {
+        canceled = cancel;
+    }
+
+    /**
+     * Gets the bolt which is striking the creeper.
+     *
+     * @return lightning entity
+     */
+    public Entity getLightning() {
+        return bolt;
+    }
+
+   /**
+    * Gets the cause of the creeper being (un)powered.
+    * @return A PowerCause value detailing the cause of change in power.
+    */
+    public PowerCause getCause() {
+        return cause;
+    }
+
+   /**
+    * An enum to specify the cause of the change in power
+    */
+     public enum PowerCause {
+         /**
+          * Power change caused by a lightning bolt
+          * Powered state: true
+          */
+         LIGHTNING,
+
+         /**
+          * Power change caused by something else (probably a plugin)
+          * Powered state: true
+          */
+         SET_ON,
+
+         /**
+          * Power change caused by something else (probably a plugin)
+          * Powered state: false
+          */
+         SET_OFF
+     }
+}