private static void save_to_db() {
        EntityManager entityManager = entityManagerFactory.createEntityManager();
        entityManager.getTransaction().begin();

        //Some data
        Address a1 = new Address();
        a1.setStreet("NiceStreet");
        a1.setBuildingNumb(11);
        a1.setHomeNumb(29);
        a1.setCity("Starogard Gdanski");
        a1.setCountry("Poland");
        
        Address a2 = new Address();
        a2.setStreet("Street_1");
        a2.setBuildingNumb(13);
        a2.setHomeNumb(22);
        a2.setCity("Gdansk");
        a2.setCountry("Poland");
        //VeganFoodPlace a_place = new VeganFoodPlace("a_place", "restaurant", a1);
        VeganFoodPlace a_place = new VeganFoodPlace("a_place", "restaurant", a1);
        
        Meal m3 = new Meal("Meal_3", CuisineTypeEnum.EUROPEAN, "snack", 4,0);
        Meal m1 = new Meal("Meal_1", CuisineTypeEnum.AFRICAN, "main meal", 1,0);
        Meal m2 = new Meal("Meal_2", CuisineTypeEnum.EUROPEAN, "dessert", 2,0);
        
        entityManager.persist(a1);        
        entityManager.persist(a2);
        entityManager.persist(m1);        
        entityManager.persist(m2);
        entityManager.persist(m3);

        entityManager.getTransaction().commit();
        entityManager.close();
        
    }