Extend EntityCombustEvent to allow setting combustion duration.

Also extend with two new events that track the entity or block that caused
the combustion.

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

@@ -4,15 +4,17 @@ import org.bukkit.entity.Entity;
 import org.bukkit.event.Cancellable;
 
 /**
- * Called when an entity combusts due to the sun.
+ * Called when an entity combusts.
  *<p />
  * If an Entity Combust event is cancelled, the entity will not combust.
  */
 public class EntityCombustEvent extends EntityEvent implements Cancellable {
+    private int duration;
     private boolean cancel;
 
-    public EntityCombustEvent(Entity what) {
-        super(Type.ENTITY_COMBUST, what);
+    public EntityCombustEvent(Entity combustee, int duration) {
+        super(Type.ENTITY_COMBUST, combustee);
+        this.duration = duration;
         this.cancel = false;
     }
 
@@ -23,4 +25,21 @@ public class EntityCombustEvent extends EntityEvent implements Cancellable {
     public void setCancelled(boolean cancel) {
         this.cancel = cancel;
     }
+
+    /**
+     * @return the amount of time (in seconds) the combustee should be alight for
+     */
+    public int getDuration() {
+        return duration;
+    }
+
+    /**
+     * The number of seconds the combustee should be alight for.
+     *
+     * This value will only ever increase the combustion time, not decrease existing combustion times.
+     * @param duration the time in seconds to be alight for.
+     */
+    public void setDuration(int duration) {
+        this.duration = duration;
+    }
 }