//	@Test
  public void testSaveShipClasses() throws Exception {
    ShipClassesFactory factory = new ShipClassesFactory();
    ArrayList<ShipClass> list = new ArrayList<ShipClass>();
    ShipBlueprint shipSpec = new ContainerShipBlueprint();

    Engine engine = new Engine();
    engine.setBsfc(178);
    engine.setManufacturer("Deutz");
    engine.setModelName("TBD 645 L9");
    engine.setkW(3825);

    shipSpec.addEngine(engine);

    ShipClass shipClass = new ShipClass(shipSpec, 10.0, "Feeder");

    list.add(shipClass);
    factory.saveShipClasses("shipclasses.xml", list);
  }
 //	@Test
 public void testCreateShipClasses() throws Exception {
   ShipClassesFactory factory = new ShipClassesFactory();
   List<ShipClass> list = factory.createShipClasses("shipclasses.xml");
 }