MyHungerGames Error

2012-05-28 11:02:37 [SEVERE] null
org.bukkit.command.CommandException: Unhandled exception executing command 'hga' in plugin HungerGames v0.3.1
	at org.bukkit.command.PluginCommand.execute(PluginCommand.java:42)
	at org.bukkit.command.SimpleCommandMap.dispatch(SimpleCommandMap.java:166)
	at org.bukkit.craftbukkit.CraftServer.dispatchCommand(CraftServer.java:479)
	at net.minecraft.server.NetServerHandler.handleCommand(NetServerHandler.java:821)
	at net.minecraft.server.NetServerHandler.chat(NetServerHandler.java:781)
	at net.minecraft.server.NetServerHandler.a(NetServerHandler.java:764)
	at net.minecraft.server.Packet3Chat.handle(Packet3Chat.java:34)
	at net.minecraft.server.NetworkManager.b(NetworkManager.java:229)
	at net.minecraft.server.NetServerHandler.a(NetServerHandler.java:113)
	at net.minecraft.server.NetworkListenThread.a(NetworkListenThread.java:78)
	at net.minecraft.server.MinecraftServer.w(MinecraftServer.java:558)
	at net.minecraft.server.MinecraftServer.run(MinecraftServer.java:450)
	at net.minecraft.server.ThreadServerApplication.run(SourceFile:492)
Caused by: java.lang.NullPointerException
	at com.randude14.hungergames.Plugin.parseToString(Plugin.java:451)
	at com.randude14.hungergames.games.HungerGame.saveTo(HungerGame.java:117)
	at com.randude14.hungergames.GameManager.saveGames(GameManager.java:169)
	at com.randude14.hungergames.commands.CommandHandler.handleAdminCommand(CommandHandler.java:373)
	at com.randude14.hungergames.commands.CommandHandler.onCommand(CommandHandler.java:34)
	at org.bukkit.command.PluginCommand.execute(PluginCommand.java:40)
	... 12 more