public Persistence() {
		// AQUI LOS RECUPERO (usarlo cuando abres la iu)
		try {
			FileInputStream fis = new FileInputStream(pathDB);
			ObjectInputStream ois = new ObjectInputStream(fis);
			Database database = (Database) ois.readObject();
			activityService.setActivities(database.getActivities());
			bookingService.setBookings(database.getBookings());
			familyService.setStudents(database.getStudents());
			bookingService.setDiningHall(database.getDiningHall());
			familyService.setHousehold(database.getHouseholds());
			ois.close();
		} catch (FileNotFoundException e) {
			this.save();
			e.printStackTrace();
		} catch (IOException e) {
			e.printStackTrace();
		} catch (ClassNotFoundException e) {
			e.printStackTrace();
		}
	}