Java Utililty Methods File Append Text

try (FileOutputStream fileOutputStream = new FileOutputStream(file, true)) {
    fileOutputStream.write(text.getBytes());
} catch (IOException e) {
    throw new RuntimeException("Error while appending text to file", e);

try {
    int chars_read = 0;
    BufferedReader in = new BufferedReader(new InputStreamReader(source, "GBK"));
    List datas = new ArrayList();
    while (in.ready()) {
        char[] data = new char[1024];
        chars_read += in.read(data, 0, 1024);
        datas.add(data);
...

FileWriter fw = new FileWriter(file, true);
fw.write(data);
fw.close();

BufferedOutputStream fout = null;
try {
    fout = new BufferedOutputStream(new FileOutputStream(tempFile, true));
    fout.write(str.getBytes());
} finally {
    if (fout != null)
        fout.close();

try (FileOutputStream fos = new FileOutputStream(file, true)) {
    fos.write(contents.getBytes());

try (FileWriter fw = new FileWriter(filePath, true)) {
    fw.write(textToAppend);
    fw.close();
    return true;
} catch (final Exception e) {
    return false;

final FileWriter fw = new FileWriter(urlFile, true);
final BufferedWriter output = new BufferedWriter(fw);
try {
    output.write(text);
    output.newLine();
    output.flush();
} finally {
    output.close();
...

BufferedWriter outputWriter = null;
outputWriter = new BufferedWriter(new FileWriter(filename));
for (int i = 0; i < in.length; i++) {
    outputWriter.write(Float.toString(in[i]));
    outputWriter.newLine();
outputWriter.flush();
outputWriter.close();
...

try {
    if (!file.exists())
        return false;
    InputStream source = new ByteArrayInputStream(output.getBytes());
    file.appendContents(source, IFile.FORCE, null);
    return true;
} catch (CoreException e) {
    e.printStackTrace();
...

if ((strList == null) || (strList.isEmpty()) || (file == null)) {
    return;
BufferedWriter bw = null;
try {
    bw = new BufferedWriter(new OutputStreamWriter(new FileOutputStream(file, true)));
    for (String str : strList) {
        bw.write(str);
...