code: public void close() throws IOException {
          ListIterator<Appender> ite = appenderList.listIterator();
          while (ite.hasNext()) {
              Appender p = ite.next();
              if (p != null)
                  p.close();
          }
          stopWatch.stop();
          Logger.firstLogEvent = true;
      }
docs: Close the log. From this point on, no logging is done.
  
  @throws java.io.IOException if the <code>Logger</code> failed to close.