流关闭的正确方法

//关闭流操作的方法
     try{
	
	//流操作
     } catch (java.io.IOException e) {
                throw e;
            } finally {
                try {
                    if (reader != null) {
                        reader.close();
                    }
                } catch (java.io.IOException e) {
                    throw e;
                } finally {
                    if (writer != null) {
                        writer.flush();
                        writer.close();
                    }
                }
            }