private static ArgValue parseArgument(String arg)
	{
		for(String opt : HELP_OPTIONS)
		{
			if(opt.equals(arg))
				return ArgValue.HELP;
		}
		for(String opt : VERBOSE_OPTIONS)
		{
			if(opt.equals(arg))
				return ArgValue.VERBOSE;
		}
		for(String opt : SILENT_OPTIONS)
		{
			if(opt.equals(arg))
				return ArgValue.SILENT;
		}
		if(arg == null || arg.length() == 0 || arg.charAt(0) == '-')
			return ArgValue.INVALID;
		return ArgValue.FILEPATH;
	}