HeavySpleef Error

2013-06-02 22:50:26 [INFO] swimmer1929 issued server command: /spleef join 1<br />
2013-06-02 22:50:26 [SEVERE] null<br />
org.bukkit.command.CommandException: Unhandled exception executing command 'spleef' in plugin HeavySpleef v1.1.2<br />
at org.bukkit.command.PluginCommand.execute(PluginCommand.java:46)<br />
at org.bukkit.command.SimpleCommandMap.dispatch(SimpleCommandMap.java:189)<br />
at org.bukkit.craftbukkit.v1_5_R3.CraftServer.dispatchCommand(CraftServer.java:523)<br />
at net.minecraft.server.v1_5_R3.PlayerConnection.handleCommand(PlayerConnection.java:965)<br />
at net.minecraft.server.v1_5_R3.PlayerConnection.chat(PlayerConnection.java:883)<br />
at net.minecraft.server.v1_5_R3.PlayerConnection.a(PlayerConnection.java:840)<br />
at net.minecraft.server.v1_5_R3.Packet3Chat.handle(Packet3Chat.java:44)<br />
at net.minecraft.server.v1_5_R3.NetworkManager.b(NetworkManager.java:292)<br />
at net.minecraft.server.v1_5_R3.PlayerConnection.d(PlayerConnection.java:109)<br />
at net.minecraft.server.v1_5_R3.ServerConnection.b(SourceFile:35)<br />
at net.minecraft.server.v1_5_R3.DedicatedServerConnection.b(SourceFile:30)<br />
at net.minecraft.server.v1_5_R3.MinecraftServer.r(MinecraftServer.java:581)<br />
at net.minecraft.server.v1_5_R3.DedicatedServer.r(DedicatedServer.java:226)<br />
at net.minecraft.server.v1_5_R3.MinecraftServer.q(MinecraftServer.java:477)<br />
at net.minecraft.server.v1_5_R3.MinecraftServer.run(MinecraftServer.java:410)<br />
at net.minecraft.server.v1_5_R3.ThreadServerApplication.run(SourceFile:573)<br />
Caused by: java.lang.NullPointerException<br />
at me.matzefratze123.heavyspleef.core.Game.addPlayer(Game.java:383)<br />
at me.matzefratze123.heavyspleef.command.CommandJoin.execute(CommandJoin.java:72)<br />
at me.matzefratze123.heavyspleef.command.CommandHandler.onCommand(CommandHandler.java:59)<br />
at org.bukkit.command.PluginCommand.execute(PluginCommand.java:44)<br />
... 15 more<br />