code: @Override
  	public ZooClass addClass(Class<?> cls) {
  		DBTracer.logCall(this, cls);
      	checkValidity(true);
  		return sm.createSchema(null, cls);
  	}
docs: Define a new database class schema based on the given Java class.
  @param cls The Java class for which a schema should be defined
  @return New schema object
  @see ZooSchema#addClass(Class)