public static void init() {
		try {
			DIR.mkdirs();
			new File(DIR, "saves").mkdir();
			
			File us = new File(DIR, "username");
			if (!us.exists() || us.length() == 0) {
				USERNAME = JOptionPane.showInputDialog("Bitte gib deinen Benutzernamen an.");
				
				if (USERNAME == null) System.exit(0);
				
				us.createNewFile();
				
				Helper.setFileContent(us, USERNAME);
			} else {
				USERNAME = Helper.getFileContent(us);
			}
		} catch (IOException e) {
			e.printStackTrace();
		}
	}