error

01:13:41 [SEVERE] Could not pass event EntityDamageByEntityEvent to SurvivalGames
org.bukkit.event.EventException
	at org.bukkit.plugin.java.JavaPluginLoader$1.execute(JavaPluginLoader.java:304)
	at org.bukkit.plugin.RegisteredListener.callEvent(RegisteredListener.java:62)
	at org.bukkit.plugin.SimplePluginManager.callEvent(SimplePluginManager.java:460)
	at org.bukkit.craftbukkit.event.CraftEventFactory.callEntityDamageEvent(CraftEventFactory.java:363)
	at org.bukkit.craftbukkit.event.CraftEventFactory.handleEntityDamageEvent(CraftEventFactory.java:381)
	at net.minecraft.server.EntityLiving.damageEntity(EntityLiving.java:608)
	at net.minecraft.server.EntityHuman.damageEntity(EntityHuman.java:595)
	at net.minecraft.server.EntityPlayer.damageEntity(EntityPlayer.java:215)
	at net.minecraft.server.EntityMonster.a(EntityMonster.java:80)
	at net.minecraft.server.EntityMonster.a(EntityMonster.java:86)
	at net.minecraft.server.EntitySpider.a(EntitySpider.java:101)
	at net.minecraft.server.EntityCreature.d_(EntityCreature.java:70)
	at net.minecraft.server.EntityLiving.e(EntityLiving.java:1130)
	at net.minecraft.server.EntityMonster.e(EntityMonster.java:21)
	at net.minecraft.server.EntitySpider.e(EntitySpider.java:26)
	at net.minecraft.server.EntityLiving.F_(EntityLiving.java:447)
	at net.minecraft.server.EntityMonster.F_(EntityMonster.java:25)
	at net.minecraft.server.EntitySpider.F_(EntitySpider.java:30)
	at net.minecraft.server.World.entityJoinedWorld(World.java:1262)
	at net.minecraft.server.WorldServer.entityJoinedWorld(WorldServer.java:106)
	at net.minecraft.server.World.playerJoinedWorld(World.java:1244)
	at net.minecraft.server.World.tickEntities(World.java:1151)
	at net.minecraft.server.MinecraftServer.w(MinecraftServer.java:558)
	at net.minecraft.server.MinecraftServer.run(MinecraftServer.java:459)
	at net.minecraft.server.ThreadServerApplication.run(SourceFile:492)
Caused by: java.lang.NullPointerException
	at com.skitscape.survivalgames.stats.StatsManager.playerDied(StatsManager.java:100)
	at com.skitscape.survivalgames.Game.killPlayer(Game.java:270)
	at com.skitscape.survivalgames.Events.DeathEvent.onPlayerDieEvent(DeathEvent.java:62)
	at sun.reflect.GeneratedMethodAccessor19.invoke(Unknown Source)
	at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
	at java.lang.reflect.Method.invoke(Method.java:597)
	at org.bukkit.plugin.java.JavaPluginLoader$1.execute(JavaPluginLoader.java:302)
	... 24 more