code: public static void close(@Nullable final Closeable closeable) {
          if (null != closeable) {
              try {
                  closeable.close();
              } catch (IOException ex) {
                  LOGGER.trace("", ex);
              }
          }
      }
docs: Close the given {@link java.io.Closeable} instance, ignoring nulls, and
  logging any thrown {@link java.io.IOException}.
  
  @param closeable to be closed