public Main() {
		try {

			readFromScanner(new Scanner(new File(pathToAutorsData)), AUTOR);
			readFromScanner(new Scanner(new File(pathToBooksData)), BOOK);
			readFromScanner(new Scanner(new File(pathToJournalsData)), JOURNAL);

			Scanner choose = new Scanner(System.in);
			String choice = null;
			while (!"end".equals(choice)) {
				menu();
				choice = choose.nextLine();
				switch (choice) {
				case "1":
					printAllLibrary();
					break;
				case "2":
					findBookOrJournalByISBN(choose);
					break;
				case "3":
					printSortedLibrary();
					break;
				case "4":
					printSortedLibrary();
					break;
				default:
					if (!choice.equals("end")) {
						System.out.println("Falsche eingabe!");
					}
					break;
				}
			}

			choose.close();
		} catch (FileNotFoundException e) {
			// TODO Auto-generated catch block
			e.printStackTrace();
		}
	}