@PostConstruct private void setup() { expectedStateEm = new ErraiEntityManager(desiredStateEm, new StorageBackendFactory() { @Override public StorageBackend createInstanceFor(ErraiEntityManager em) { return new WebStorageBackend(em, "expected-state:"); } }); entityComparator = new EntityComparator(desiredStateEm.getMetamodel(), attributeAccessor); }