IConfig cPersistence = config.getConfig("persistence");
if (cPersistence != null) {
String clazz = cPersistence.getExtracted("class",DummyPersistence.class.getCanonicalName());
persistence = (BpmPersistence) activator.getObject(clazz);
} else
persistence = new DummyPersistence();
persistence.initialize(cPersistence);
}