JAVA言語の作法について

public void extractFile() throws IOException {
    FileReader fileReader = null;
    try {
        fileReader = new FileReader(inputFileName);
        FileWriter fileWriter = null;
        try {
            fileWriter = new FileWriter(outputFileName);
            extract(fileReader, fileWriter);
        } finally {
            if (fileWriter != null) {
                fileWriter.close();
            }
        }
    } finally {
        if (fileReader != null) {
            fileReader.close();
        }
    }

}

private void extract(Reader reader, Writer writer)
        throws IOException {
    BufferedReader bufferedReader = new BufferedReader(reader);
    BufferedWriter bufferedWriter = new BufferedWriter(writer);
    PrintWriter printWriter = new PrintWriter(bufferedWriter);
    boolean isToWrite = false;//書き出すべきか？
    String line;
    while ((line = bufferedReader.readLine()) != null) {//EOFまで読み込み
        if (isToWrite) {//書き込みモードか？
            printWriter.println(line);
            if (p2.matcher(line).find()) {//終了文字列にマッチ
                isToWrite = false;
            }
            continue;
        }
        if (p1.matcher(line).find()) {//開始文字列にマッチ
            printWriter.println(line);
            isToWrite = true;
        }
    }
    printWriter.flush();
}