code: private String whereIs(String savePoint, Class<?> objClass)
     {
  	if (savePoint == null || savePoint.length() == 0)
  	   throw new RequiredException("savePoint");
  	
  	StringBuffer text = new StringBuffer();
  	
  	text.append(this.rootPath).append("/")
  	.append(objClass.getName()).append(".")
  	.append(savePoint).append(fileExtension);
  	
  	return text.toString();
     }
docs: ----------------------------------------------