[Demonstration 1]

[Buggy Method]
void generateDoc(Map<TypeElement, Map<Integer, CodecModel>> model, Template codecTemplate) {
    String content = generateFromTemplate(codecTemplate, model);
    String fileName = "HazelcastOpenBinaryProtocol-" + getClass().getPackage().getImplementationVersion();
    saveFile(fileName, "document", content, false);
    CodeGenerationUtils.setDocumentCreated(true);
}

[Buggy Hunk]
saveFile(fileName, "document", content, false);

[Patch]
saveFile(fileName, "document", content);

[Demonstration 2]

[Buggy Method]
public static Result service(String ownerName, String projectName, String service, boolean isAdvertise) throws IOException, UnsupportedOperationException, ServletException {
    if (!isSupportedService(service)) {
        return forbidden(String.format("Unsupported service: '%s'", service));
    }
    Project project = Project.findByOwnerAndProjectName(ownerName, projectName);
    if (project == null) {
        return notFound();
    }
    models.User user = UserApp.currentUser();
    if (!isAllowed(project, service)) {
        if (user.isAnonymous()) {
            return BasicAuthAction.unauthorized(response());
        } else {
            // If you want the Git client showing your custom message to
            // the user, the Content-Type should be exact "text/plain"
            // without any parameter. For more details, see the code at
            // https://github.com/git/git/commit/426e70d4a11ce3b4f70636d57c6a0ab16ae08a00#diff-eea0ad565ec5903a11b6023755d491cfR154
            response().setHeader("Content-Type", "text/plain");
            return forbidden(String.format("'%s' has no permission to '%s/%s'.", user.name, ownerName, projectName));
        }
    }
    if (isAdvertise) {
        return ok(RepositoryService.gitAdvertise(project, service, response()));
    } else {
        if (request().body().isMaxSizeExceeded()) {
            return status(REQUEST_ENTITY_TOO_LARGE);
        } else {
            user.visits(project);
            return ok(RepositoryService.gitRpc(project, service, request(), response()));
        }
    }
}

[Buggy Hunk]
user.name, ownerName, projectName));

[Patch]
user.loginId, ownerName, projectName));

[Demonstration 3]

[Buggy Method]
private void createObservableFor(TypeElement sourceType, String templateName, int inheritDepth) {
    String pkgName = elementUtils.getPackageOf(sourceType).getQualifiedName().toString();
    String sourceTypeName = sourceType.getSimpleName().toString();
    String targetTypeName;
    String SUFFIX = "Internal";
    if (sourceTypeName.endsWith(SUFFIX))
        targetTypeName = capitalizeFirstLetter(sourceTypeName).substring(0, sourceTypeName.length() - SUFFIX.length());
    else
        targetTypeName = "Observable" + capitalizeFirstLetter(sourceTypeName);
    Template targetClass = Template.fromResource(templateName, 0).replace(SOURCE_CLASS_FQN, sourceType.getQualifiedName().toString()).replace(SOURCE_CLASS_NAME, sourceType.getSimpleName().toString() + TypeSimplifier.actualTypeParametersString(sourceType)).replace(PACKAGE_NAME, pkgName).replace(TARGET_CLASS_PARAMETRIZED, targetTypeName + typeSimplifier.formalTypeParametersString(sourceType)).replace(TARGET_CLASS_NAME, targetTypeName);
    String[] extraImports = getExtraImports();
    if (extraImports != null) {
        StringBuilder importBuilder = new StringBuilder();
        for (int i = 0; i < extraImports.length; ++i) {
            String extraImport = extraImports[i];
            if (!extraImport.startsWith("import ")) {
                extraImport = "import " + extraImport;
            }
            if (!extraImport.endsWith(";")) {
                extraImport += ";";
            }
            importBuilder.append(extraImport);
            if (i < extraImports.length - 1) {
                importBuilder.append("\n");
            }
        }
        targetClass.replace(EXTRA_IMPORTS, importBuilder.toString());
    } else {
        targetClass.replace(EXTRA_IMPORTS, "");
    }
    try {
        JavaFileObject jfo = filer.createSourceFile(pkgName + "." + targetTypeName);
        Writer writer = jfo.openWriter();
        targetClass.replace(PRE_CONSTRUCTOR, getPreConstructor(pkgName, targetTypeName, sourceType));
        targetClass.replace(CONSTRUCTORS, processConstructors(targetTypeName, sourceType, templateName, inheritDepth));
        targetClass.replace(FIELDS_AND_METHODS, processFieldsAndMethods(sourceType, templateName, inheritDepth));
        writer.write(targetClass.toString());
        writer.close();
    } catch (IOException e) {
        e.printStackTrace();
        error(e.getMessage());
    }
}

[Buggy Hunk]
String pkgName = elementUtils.getPackageOf( sourceType ).getQualifiedName().toString();

[Patch]
pkgName = elementUtils.getPackageOf( sourceType ).getQualifiedName().toString();