setUp(Address.class, Company.class, Customer.class, Employee.class,
FullTimeEmployee.class, LineItem.class, PartTimeEmployee.class,
Person.class, Product.class, ProductOrder.class, CLEAR_TABLES);
ProductOrder order = new ProductOrder();
LineItem item0 = new LineItem();
LineItem item1 = new LineItem();
LineItem item2 = new LineItem();
order.getItems().add(item0);
order.getItems().add(item1);
order.getItems().add(item2);
em.getTransaction().begin();