public static void loadAllXML() {
		if (isLoaded) {
			System.out.println("XML already loaded");
			return;
		}
		isLoaded = true;
		DBConnection.resetDatabase();
		
		// Load users
		new XMLReader("./xml/users.xml");
		// Load quizzes
		new XMLReader("./xml/bunny.xml");
		new XMLReader("./xml/cities.xml");
		new XMLReader("./xml/simple_quiz.xml");
		// Load achievement
		new XMLReader("./xml/achievements.xml");
		// Load records
		new XMLReader("./xml/records.xml");
		// Load announcements
		new XMLReader("./xml/announcements.xml");
		// Load messages
		new XMLReader("./xml/messages.xml");
	}