2012-07-23 11:14:47 [SEVERE] Could not pass event EntityDamageByEntityEvent to Infected
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.fireEvent(SimplePluginManager.java:477)
        at org.bukkit.plugin.SimplePluginManager.callEvent(SimplePluginManager.java:462)
        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.EntityArrow.F_(EntityArrow.java:214)
        at net.minecraft.server.World.tickEntity(World.java:1371)
        at net.minecraft.server.World.entityJoinedWorld(World.java:1311)
        at net.minecraft.server.WorldServer.entityJoinedWorld(WorldServer.java:106)
        at net.minecraft.server.World.playerJoinedWorld(World.java:1303)
        at net.minecraft.server.World.tickEntities(World.java:1196)
        at net.minecraft.server.MinecraftServer.w(MinecraftServer.java:563)
        at net.minecraft.server.MinecraftServer.run(MinecraftServer.java:464)
        at net.minecraft.server.ThreadServerApplication.run(SourceFile:492)
Caused by: java.lang.NullPointerException
        at me.mannil.infected.InfectedListener.onDamage(InfectedListener.java:39)
        at sun.reflect.GeneratedMethodAccessor45.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)
        ... 17 more
2012-07-23 11:14:47 [SEVERE] Could not pass event EntityDamageByEntityEvent to Infected
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.fireEvent(SimplePluginManager.java:477)
        at org.bukkit.plugin.SimplePluginManager.callEvent(SimplePluginManager.java:462)
        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.EntityArrow.F_(EntityArrow.java:214)
        at net.minecraft.server.World.tickEntity(World.java:1371)
        at net.minecraft.server.World.entityJoinedWorld(World.java:1311)
        at net.minecraft.server.WorldServer.entityJoinedWorld(WorldServer.java:106)
        at net.minecraft.server.World.playerJoinedWorld(World.java:1303)
        at net.minecraft.server.World.tickEntities(World.java:1196)
        at net.minecraft.server.MinecraftServer.w(MinecraftServer.java:563)
        at net.minecraft.server.MinecraftServer.run(MinecraftServer.java:464)
        at net.minecraft.server.ThreadServerApplication.run(SourceFile:492)
Caused by: java.lang.NullPointerException
        at me.mannil.infected.InfectedListener.onDamage(InfectedListener.java:39)
        at sun.reflect.GeneratedMethodAccessor45.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)
        ... 17 more