public FileSystem(MyDriveManager mdm) {
    super();
    setMyDriveManager(mdm);

    super.setIdSeed(0);

    Root root = new Root();
    this.addUsers(root);

    try {
      super.setFsRoot(
          new Directory(this.generateUniqueId(), PATH_DELIM, root.getUmask(), root, this));

    } catch (InvalidFileNameException | InvalidMaskException e) {
      /* This exception should not occur it only exists to protect the method against
       * bad programming
       */
      log.trace(e.getMessage());
      e.printStackTrace();
    }

    Directory home = new Directory(generateUniqueId(), HOME_DIR, root.getUmask(), root, getSlash());

    addToSlash(home);

    Directory rootHomeDirectory =
        new Directory(generateUniqueId(), root.getUsername(), root.getUmask(), root, home);
    home.addFile(rootHomeDirectory);
    root.setHomeDirectory((Directory) home.getFileByName(ROOT_USER));

    Guest guest = new Guest();
    Directory guestHomeDirectory =
        new Directory(generateUniqueId(), guest.getUsername(), guest.getUmask(), guest, home);
    home.addFile(guestHomeDirectory);
    guest.setHomeDirectory((Directory) home.getFileByName(GUEST_USER));
    addUsers(guest);
  }
 /* Uniques Ids */
 private int generateUniqueId() {
   Integer idSeed = super.getIdSeed();
   super.setIdSeed(++idSeed);
   return idSeed;
 }