JAVA言語の作法について

public int extractFile() throws IOException {
	BufferedReader breader;
	BufferedWriter bwriter;
	int rc;
	try{
		breader = new BufferedReader(new FileReader(inputFileName));
	}
	catch(FileNotFoundException e){//inputFileNameオープン時の例外
		System.err.println(e);
		return -1;
	}
	try{
		bwriter = new BufferedWriter(new FileWriter(outputFileName));
	}
	catch(IOException e){//outputFileNameオープン時の例外
		System.err.println(e);
		breader.close();
		return -1;
	}		
	boolean mode = false;//出力制御フラグ
	String s = new String();
	try{
		while ((s = breader.readLine()) != null) {//EOFまで読み込み
			if (mode) {//書き込みモードか？
				bwriter.write(s);
				bwriter.newLine();
				if (p2.matcher(s).find()) {//終了文字列にマッチ
					mode = false;
				}
				continue;
			}
			if (p1.matcher(s).find()) {//開始文字列にマッチ
				bwriter.write(s);
				bwriter.newLine();
				mode = true;
			}
		}
		rc = 0;
	}catch(IOException e){//読み込みもしくは書き込み時の例外
		System.err.println(e);
		rc = -1;
	}finally{
		bwriter.close();
		breader.close();
	}
	return rc;
}

public void extractFile() throws IOException {
	BufferedReader reader;
	BufferedWriter writer;
	try{
		reader = new BufferedReader(new FileReader(inputFileName));
	}
	catch(FileNotFoundException e){//inputFileNameオープン時の例外
		throw e;
	}
	try{
		writer = new BufferedWriter(new FileWriter(outputFileName));
	}
	catch(IOException e){//outputFileNameオープン時の例外
		reader.close();
		throw e;
	}		
	try{
		boolean isToWrite = false;//書き出すべきか？
		String line;
		while ((line = reader.readLine()) != null) {//EOFまで読み込み
			if (isToWrite) {//書き込みモードか？
				writer.write(line);
				writer.newLine();
				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
				writer.write(line);
				writer.newLine();
				isToWrite = true;
			}
		}
	}catch(IOException e){//読み込みもしくは書き込み時の例外
		throw e;
	}finally{
		writer.close();
		reader.close();
	}
}