How to create baseline in Windchill

WTHashSet wtHashSet = new WTHashSet();
wtHashSet.addElement(epmDocument);
ManagedBaseline managedBaseline = ManagedBaseline.newManagedBaseline();
managedBaseline.setName("BASELINE_NAME");
managedBaseline.setNumber("BASELINE_NUMBER");
managedBaseline.setDescription("BASELINE_DESCRIPTION");
managedBaseline.setContainer(epmDocument.getContainer());
managedBaseline.setFolderingInfo(epmDocument.getFolderingInfo());
managedBaseline.setTopObject(epmDocument);
managedBaseline = (ManagedBaseline)PersistenceHelper.manager.save(managedBaseline);