public class CommandManager implements CommandExecutor {

    private Main plugin = Main.getInstance();
    private ArrayList<SubCommands> commands = new ArrayList<SubCommands>();

    public String help = "help";

    public void setup() {
        plugin.getCommand("test").setExecutor(this);
        this.commands.add(new Help());
    }

    public boolean onCommand(CommandSender sender, Command command, String string, String[] args) {
        Player player = (Player) sender;

        if (command.getName().equalsIgnoreCase("test")) {
            if (args.length == 0) {
                player.sendMessage("Do /test help for more information ");
            }

            SubCommands cmd = this.get(args[0]);

            if (cmd == null) {
                player.sendMessage("Invalid Arguments!");
                return true;
            }

            ArrayList<String> arrayList = new ArrayList<String>();
            arrayList.addAll(Arrays.asList(args));
            arrayList.remove(0);

            try{
                cmd.onCommand(player,args);
            }catch (Exception e){
                player.sendMessage("An error has occurred.");
                e.printStackTrace();
            }
        }
        return true;
    }

    private SubCommands get(String name) {
        Iterator<SubCommands> subcommands = this.commands.iterator();

        while (subcommands.hasNext()) {
            SubCommands sc = (SubCommands) subcommands.next();

            if (sc.name().equalsIgnoreCase(name)) {
                return sc;
            }
        }
        return null;
    }
}