code: public synchronized void save(NvdCveInfo updatedValue) throws UpdateException {
          if (updatedValue == null) {
              return;
          }
          save(LAST_UPDATED_BASE + updatedValue.getId(), String.valueOf(updatedValue.getTimestamp()));
      }
docs: Saves the last updated information to the properties file.
  
  @param updatedValue the updated NVD CVE entry
  @throws UpdateException is thrown if there is an update exception