[Demonstration 1]

[Buggy Method]
private static List<String> readFile(Project myProject, String path) {
    Path fileP = Paths.get(myProject.getBasePath() + path);
    try {
        if (!Files.exists(fileP)) {
            Files.createFile(fileP);
        }
        List<String> lines = Files.readAllLines(fileP);
        if (lines.size() != 0) {
            return lines;
        }
    } catch (IOException e) {
        return new ArrayList<>();
    }
    return new ArrayList<>();
}

[Buggy Hunk]
List<String> lines = Files.readAllLines(fileP);

[Patch]
List<String> lines = Files.readAllLines(fileP, Charset.defaultCharset());

[Demonstration 2]

[Buggy Method]
public static void createJavaPOFile(TableInfo tableInfo, TypeConvertor convertor) {
    String src = createJavaSrc(tableInfo, convertor);
    String packPath = DBManager.getConfiguration().getSrcPath() + File.separator + packageToPath(DBManager.getConfiguration().getPoPackage());
    String fileName = StringUtils.firstCharUpperCase(tableInfo.getTname()) + ".java";
    File dir = new File(packPath);
    if (!dir.exists())
        dir.mkdir();
    File file = new File(packPath + File.separator + fileName);
    try (BufferedWriter bw = new BufferedWriter(new FileWriter(file))) {
        bw.write(src);
        System.out.println("Created " + fileName);
    } catch (IOException e) {
        e.printStackTrace();
    }
}

[Buggy Hunk]
if (!dir.exists()) dir.mkdir();

[Patch]
if (!dir.exists()) dir.mkdirs();

[Demonstration 3]

[Buggy Method]
private static void createFolders(String folderPath) throws IOException {
    if (!new File(folderPath).exists()) {
        Files.createDirectory(Paths.get(folderPath));
    }
}

[Buggy Hunk]
Files.createDirectory(Paths.get(folderPath));

[Patch]
Files.createDirectories(Paths.get(folderPath));