00:03:52 [SEVERE] Could not pass event EntityDeathEvent to EnderDragonSMP v1.1
org.bukkit.event.EventException
        at org.bukkit.plugin.java.JavaPluginLoader$1.execute(JavaPluginLoader.ja
va:427)
        at org.bukkit.plugin.RegisteredListener.callEvent(RegisteredListener.jav
a:62)
        at org.bukkit.plugin.TimedRegisteredListener.callEvent(TimedRegisteredLi
stener.java:46)
        at org.bukkit.plugin.SimplePluginManager.fireEvent(SimplePluginManager.j
ava:478)
        at org.bukkit.plugin.SimplePluginManager.callEvent(SimplePluginManager.j
ava:463)
        at org.bukkit.craftbukkit.v1_5_R3.event.CraftEventFactory.callEntityDeat
hEvent(CraftEventFactory.java:344)
        at net.minecraft.server.v1_5_R3.EntityLiving.dropDeathLoot(EntityLiving.
java:959)
        at net.minecraft.server.v1_5_R3.EntityLiving.die(EntityLiving.java:907)
        at net.minecraft.server.v1_5_R3.EntityLiving.damageEntity(EntityLiving.j
ava:764)
        at net.minecraft.server.v1_5_R3.EntityEnderDragon.dealDamage(EntityEnder
Dragon.java:505)
        at net.minecraft.server.v1_5_R3.EntityEnderDragon.a(EntityEnderDragon.ja
va:494)
        at net.minecraft.server.v1_5_R3.EntityComplexPart.damageEntity(SourceFil
e:38)
        at net.minecraft.server.v1_5_R3.EntityArrow.l_(EntityArrow.java:229)
        at net.minecraft.server.v1_5_R3.World.entityJoinedWorld(World.java:1457)
        at net.minecraft.server.v1_5_R3.WorldServer.entityJoinedWorld(WorldServer.java:624)
        at net.minecraft.server.v1_5_R3.World.playerJoinedWorld(World.java:1432)
        at net.minecraft.server.v1_5_R3.World.tickEntities(World.java:1304)
        at net.minecraft.server.v1_5_R3.WorldServer.tickEntities(WorldServer.java:522)
        at net.minecraft.server.v1_5_R3.MinecraftServer.r(MinecraftServer.java:562)
        at net.minecraft.server.v1_5_R3.DedicatedServer.r(DedicatedServer.java:227)
        at net.minecraft.server.v1_5_R3.MinecraftServer.q(MinecraftServer.java:472)
        at net.minecraft.server.v1_5_R3.MinecraftServer.run(MinecraftServer.java:404)
        at net.minecraft.server.v1_5_R3.ThreadServerApplication.run(SourceFile:573)
Caused by: java.lang.NullPointerException
        at com.gmail.skyshayde.EndListener.onEnderDragonDie(EndListener.java:166)
        at sun.reflect.GeneratedMethodAccessor165.invoke(Unknown Source)
        at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
        at java.lang.reflect.Method.invoke(Method.java:601)
        at org.bukkit.plugin.java.JavaPluginLoader$1.execute(JavaPluginLoader.java:425)
        ... 22 more