code: public static void closeEL(OutputStream os) {
  	try {
  	    if (os != null) os.close();
  	}
  	// catch (AlwaysThrow at) {throw at;}
  	catch (Throwable t) {
  	    ExceptionUtil.rethrowIfNecessary(t);
  	}
      }
docs: close outputstream without a Exception
  
  @param os