code: public static void closeQuietly(Closeable closeable) {
          try {
              if (closeable != null) {
                  closeable.close();
              }
          } catch (IOException e) {
              LOGGER.log(Level.FINE, e.getMessage(), e);
          }
      }
docs: Invokes the {@link Closeable#close()} method on the given object. If an {@link IOException} occurs during the
  method call, it will be caught and logged on level {@link Level#WARNING}.
  
  @param closeable the data source which should be closed (may be null).