Program: 73659
Project: 73659
Buggy source:
/** 
 * Save the changes of an existing model in the database or create a new model in the database. Remove all prior entries to the saved model from the cache, including any other models that reference it.
 * @param xmlDBModel The model object that is required to be saved orcreated in the database.
 * @param dbConnection The connection to the database that will be used toexecute the task.
 * @return A boolean indicator of weather the operation was successful ornot.
 * @exception DBConnectionException Thrown if there is a database connectionerror.
 * @exception DBExecutionException Thrown if the execution failed.
 * @exception IllegalArgumentException Thrown if the parameters were notright.
 * @exception ModelAlreadyExistException Thrown if the model being createdalready exists.
 * @throws XMLDBModelParsingException Thrown if the model is parsedincorrectly.
 * @throws CircularDependencyException
 */
private String save(XMLDBModel xmlDBModel,DBConnection dbConnection) throws DBConnectionException, DBExecutionException, IllegalArgumentException, ModelAlreadyExistException, XMLDBModelParsingException, CircularDependencyException {
  String returnString=null;
  try {
    if (xmlDBModel == null) {
      throw new IllegalArgumentException("String_Node_Str" + "String_Node_Str");
    }
    xmlDBModel=populateChildModelsList(xmlDBModel);
    if (dbConnection == null) {
      throw new DBConnectionException("String_Node_Str");
    }
    if (xmlDBModel.getIsNew()) {
      CreateModelTask createModelTask=new CreateModelTask(xmlDBModel);
      returnString=dbConnection.executeCreateModelTask(createModelTask);
    }
 else {
      SaveModelTask saveModelTask=new SaveModelTask(xmlDBModel);
      returnString=dbConnection.executeSaveModelTask(saveModelTask);
    }
  }
 catch (  DBExecutionException e) {
    throw new DBExecutionException("String_Node_Str" + e.getMessage(),e);
  }
  updateCache(xmlDBModel);
  return returnString;
}

Fixed version (ground truth):
/** 
 * Save the changes of an existing model in the database or create a new model in the database. Remove all prior entries to the saved model from the cache, including any other models that reference it.
 * @param xmlDBModel The model object that is required to be saved orcreated in the database.
 * @param dbConnection The connection to the database that will be used toexecute the task.
 * @return A string representing the model id that was saved.
 * @exception DBConnectionException Thrown if there is a database connectionerror.
 * @exception DBExecutionException Thrown if the execution failed.
 * @exception IllegalArgumentException Thrown if the parameters were notright.
 * @exception ModelAlreadyExistException Thrown if the model being createdalready exists.
 * @throws XMLDBModelParsingException Thrown if the model is parsedincorrectly.
 * @throws CircularDependencyException
 */
private String save(XMLDBModel xmlDBModel,DBConnection dbConnection) throws DBConnectionException, DBExecutionException, IllegalArgumentException, ModelAlreadyExistException, XMLDBModelParsingException, CircularDependencyException {
  String newModelId=null;
  try {
    if (xmlDBModel == null) {
      throw new IllegalArgumentException("String_Node_Str" + "String_Node_Str");
    }
    xmlDBModel=populateChildModelsList(xmlDBModel);
    if (dbConnection == null) {
      throw new DBConnectionException("String_Node_Str");
    }
    if (xmlDBModel.getIsNew()) {
      CreateModelTask createModelTask=new CreateModelTask(xmlDBModel);
      newModelId=dbConnection.executeCreateModelTask(createModelTask);
    }
 else {
      SaveModelTask saveModelTask=new SaveModelTask(xmlDBModel);
      newModelId=dbConnection.executeSaveModelTask(saveModelTask);
    }
  }
 catch (  DBExecutionException e) {
    throw new DBExecutionException("String_Node_Str" + e.getMessage(),e);
  }
  updateCache(xmlDBModel);
  return newModelId;
}