ArrayList error help

So, i've come across an error which i've no idea why it's occurring so hopefully you guys will, I've created events in which certain things will be executed but I only want them to execute if they're in either teamRed or teamBlue, so here's what i've got:

Code:

@EventHandler
    public void onPlayerInteract(PlayerInteractEvent e){
        if (!(teamRed.contains(e.getPlayer().getName()))) return;
        if (!(teamBlue.contains(e.getPlayer().getName()))) return;
        if (magicNachoPlayers.contains(e.getPlayer())){
            Player player = (Player) e.getPlayer();
            if (e.getAction() == e.getAction().RIGHT_CLICK_AIR || e.getAction() == e.getAction().RIGHT_CLICK_BLOCK){
                if (e.getPlayer().getItemInHand().getType() == Material.GOLD_NUGGET){
                    kitSelection.show(player);
                }
            }
        }
}

It throws an error and points to the lines "if(!(teamTEAM.contains(e.getPlayer()))) return;", have I coded something wrong? is the "!" in the wrong place? Any help is appreciated
Oh, and here's the error message if you need it:

Code:

[20:43:54 ERROR]: Could not pass event PlayerInteractEvent to NachoMagic v1.0
org.bukkit.event.EventException
    at org.bukkit.plugin.java.JavaPluginLoader$1.execute(JavaPluginLoader.java:320) ~[craftbukkit.jar:git-Bukkit-1.7.2-R0.3-b3020jnks]
    at org.bukkit.plugin.RegisteredListener.callEvent(RegisteredListener.java:62) ~[craftbukkit.jar:git-Bukkit-1.7.2-R0.3-b3020jnks]
    at org.bukkit.plugin.SimplePluginManager.fireEvent(SimplePluginManager.java:486) [craftbukkit.jar:git-Bukkit-1.7.2-R0.3-b3020jnks]
    at org.bukkit.plugin.SimplePluginManager.callEvent(SimplePluginManager.java:471) [craftbukkit.jar:git-Bukkit-1.7.2-R0.3-b3020jnks]
    at org.bukkit.craftbukkit.v1_7_R1.event.CraftEventFactory.callPlayerInteractEvent(CraftEventFactory.java:195) [craftbukkit.jar:git-Bukkit-1.7.2-R0.3-b3020jnks]
    at net.minecraft.server.v1_7_R1.PlayerInteractManager.interact(PlayerInteractManager.java:374) [craftbukkit.jar:git-Bukkit-1.7.2-R0.3-b3020jnks]
    at net.minecraft.server.v1_7_R1.PlayerConnection.a(PlayerConnection.java:628) [craftbukkit.jar:git-Bukkit-1.7.2-R0.3-b3020jnks]
    at net.minecraft.server.v1_7_R1.PacketPlayInBlockPlace.a(SourceFile:60) [craftbukkit.jar:git-Bukkit-1.7.2-R0.3-b3020jnks]
    at net.minecraft.server.v1_7_R1.PacketPlayInBlockPlace.handle(SourceFile:9) [craftbukkit.jar:git-Bukkit-1.7.2-R0.3-b3020jnks]
    at net.minecraft.server.v1_7_R1.NetworkManager.a(NetworkManager.java:146) [craftbukkit.jar:git-Bukkit-1.7.2-R0.3-b3020jnks]
    at net.minecraft.server.v1_7_R1.ServerConnection.c(SourceFile:134) [craftbukkit.jar:git-Bukkit-1.7.2-R0.3-b3020jnks]
    at net.minecraft.server.v1_7_R1.MinecraftServer.u(MinecraftServer.java:655) [craftbukkit.jar:git-Bukkit-1.7.2-R0.3-b3020jnks]
    at net.minecraft.server.v1_7_R1.DedicatedServer.u(DedicatedServer.java:250) [craftbukkit.jar:git-Bukkit-1.7.2-R0.3-b3020jnks]
    at net.minecraft.server.v1_7_R1.MinecraftServer.t(MinecraftServer.java:545) [craftbukkit.jar:git-Bukkit-1.7.2-R0.3-b3020jnks]
    at net.minecraft.server.v1_7_R1.MinecraftServer.run(MinecraftServer.java:457) [craftbukkit.jar:git-Bukkit-1.7.2-R0.3-b3020jnks]
    at net.minecraft.server.v1_7_R1.ThreadServerApplication.run(SourceFile:617) [craftbukkit.jar:git-Bukkit-1.7.2-R0.3-b3020jnks]
Caused by: java.lang.NullPointerException
    at magicNachoArena.magicNachoListeners.onPlayerInteract(magicNachoListeners.java:92) ~[?:?]
    at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) ~[?:1.6.0_65]
    at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39) ~[?:1.6.0_65]
    at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25) ~[?:1.6.0_65]
    at java.lang.reflect.Method.invoke(Method.java:597) ~[?:1.6.0_65]
    at org.bukkit.plugin.java.JavaPluginLoader$1.execute(JavaPluginLoader.java:318) ~[craftbukkit.jar:git-Bukkit-1.7.2-R0.3-b3020jnks]
    ... 15 more

 

A stacktrace would be nice

 

What error gets thrown?

 

I guess you guys read it before I edited in the error message , well the error is there now.

 

How are you initializing/getting your lists, because they are null.

 

Nachoman44

Just to make sure, so your ArrayLists are named teamRed, teamBlue and magicNachoPlayers ?

 

Well, this is embarrassing... it was the way method I used in order to get hold of the arraylists from my main class. Managed to fix it ^^ thanks for your help and quick replies <3