Department department = new Department();
			department.setId(1L);
			department.setName("Department");

			Employee employee = new Employee();
			employee.setId(1L);
			employee.setDepartment(department);
			employee.setUsername("User");

			entityManager.persist(employee);

			System.err.println("Some message1");

			entityManager.flush();
			entityManager.clear();

			System.err.println("Some message2");
			
			Employee employee2 = entityManager.find(Employee.class, 1L);