@Override 
public void onEnable() {
        if(getServer().getPluginManager().getPlugin("Citizens") == null || !getServer().getPluginManager().getPlugin("Citizens").isEnabled()) {
            getLogger().log(Level.SEVERE, "Citizens 2.0 not found or not enabled");
            getServer().getPluginManager().disablePlugin(this);
            return;
        }

        createNPCs(); //Citizens API used here
}