Added DamageType.VOID

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

@@ -144,6 +144,12 @@ public class EntityDamageEvent extends EntityEvent implements Cancellable {
          * Damage: variable
          */
         ENTITY_EXPLOSION,
+        /**
+         * Damage caused by falling into the void
+         *
+         * Damage: 4 for players
+         */
+        VOID,
         /**
          * Custom damage.
          *