13:01:03 [SEVERE] java.lang.NullPointerException: Nodes must be provided.
13:01:03 [SEVERE]       at org.yaml.snakeyaml.nodes.NodeTuple.<init>(NodeTuple.java:29)
13:01:03 [SEVERE]       at org.yaml.snakeyaml.representer.BaseRepresenter.representMapping(BaseRepresenter.java:171)
13:01:03 [SEVERE]       at org.yaml.snakeyaml.representer.SafeRepresenter$RepresentMap.representData(SafeRepresenter.java:201)
13:01:03 [SEVERE]       at org.bukkit.configuration.file.YamlRepresenter$RepresentConfigurationSection.representData(YamlRepresenter.java:23)
13:01:03 [SEVERE]       at org.yaml.snakeyaml.representer.BaseRepresenter.representData(BaseRepresenter.java:96)
13:01:03 [SEVERE]       at org.yaml.snakeyaml.representer.BaseRepresenter.representMapping(BaseRepresenter.java:164)
13:01:03 [SEVERE]       at org.yaml.snakeyaml.representer.SafeRepresenter$RepresentMap.representData(SafeRepresenter.java:201)
13:01:03 [SEVERE]       at org.bukkit.configuration.file.YamlRepresenter$RepresentConfigurationSection.representData(YamlRepresenter.java:23)
13:01:03 [SEVERE]       at org.yaml.snakeyaml.representer.BaseRepresenter.representData(BaseRepresenter.java:96)
13:01:03 [SEVERE]       at org.yaml.snakeyaml.representer.BaseRepresenter.representMapping(BaseRepresenter.java:164)
13:01:03 [SEVERE]       at org.yaml.snakeyaml.representer.SafeRepresenter$RepresentMap.representData(SafeRepresenter.java:201)
13:01:03 [SEVERE]       at org.yaml.snakeyaml.representer.BaseRepresenter.representData(BaseRepresenter.java:96)
13:01:03 [SEVERE]       at org.yaml.snakeyaml.representer.BaseRepresenter.represent(BaseRepresenter.java:66)
13:01:03 [SEVERE]       at org.yaml.snakeyaml.Yaml.dumpAll(Yaml.java:270)
13:01:03 [SEVERE]       at org.yaml.snakeyaml.Yaml.dumpAll(Yaml.java:261)
13:01:03 [SEVERE]       at org.yaml.snakeyaml.Yaml.dumpAll(Yaml.java:233)
13:01:03 [SEVERE]       at org.yaml.snakeyaml.Yaml.dump(Yaml.java:209)
13:01:03 [SEVERE]       at org.bukkit.configuration.file.YamlConfiguration.saveToString(YamlConfiguration.java:38)
13:01:03 [SEVERE]       at org.bukkit.configuration.file.FileConfiguration.save(FileConfiguration.java:54)
13:01:03 [SEVERE]       at de.bananaco.bpermissions.imp.YamlWorld.saveUnsafe(YamlWorld.java:313)
13:01:03 [SEVERE]       at de.bananaco.bpermissions.imp.YamlWorld.cleanup(YamlWorld.java:68)
13:01:03 [SEVERE]       at de.bananaco.bpermissions.api.WorldManager.cleanup(WorldManager.java:158)
13:01:03 [SEVERE]       at de.bananaco.bpermissions.imp.Permissions.onCommand(Permissions.java:516)
13:01:03 [SEVERE]       at org.bukkit.command.PluginCommand.execute(PluginCommand.java:44)
13:01:03 [SEVERE]       at org.bukkit.command.SimpleCommandMap.dispatch(SimpleCommandMap.java:189)
13:01:03 [SEVERE]       at org.bukkit.craftbukkit.v1_5_R3.CraftServer.dispatchCommand(CraftServer.java:523)
13:01:03 [SEVERE]       at org.bukkit.craftbukkit.v1_5_R3.CraftServer.dispatchServerCommand(CraftServer.java:512)
13:01:03 [SEVERE]       at net.minecraft.server.v1_5_R3.DedicatedServer.an(DedicatedServer.java:262)
13:01:03 [SEVERE]       at net.minecraft.server.v1_5_R3.DedicatedServer.r(DedicatedServer.java:227)
13:01:03 [SEVERE]       at net.minecraft.server.v1_5_R3.MinecraftServer.q(MinecraftServer.java:477)
13:01:03 [SEVERE]       at net.minecraft.server.v1_5_R3.MinecraftServer.run(MinecraftServer.java:410)
13:01:03 [SEVERE]       at net.minecraft.server.v1_5_R3.ThreadServerApplication.run(SourceFile:573)