public static <T> T getObj(String className, Class<T> clazz) {
    return doGetObjWithArgs(className, clazz);
  }
Create an instance of the specified class with the empty constructor.

@param <T> type of the object to return
@param className name of the class
@param clazz type of object to return
@return instance of the class
@throws SamzaException if an exception was thrown while trying to create the class
samza-core/src/main/java/org/apache/samza/util/ReflectionUtil.java