private void generateClass() throws IOException {

    AST ast = AST.newAST(AST.JLS8);
    CompilationUnit unit = ast.newCompilationUnit();

    TypeDeclaration type = ast.newTypeDeclaration();
    type.setInterface(false);
    type.modifiers().add(ast.newModifier(Modifier.ModifierKeyword.PUBLIC_KEYWORD));
    type.setName(ast.newSimpleName("GeneratedClass"));

    MethodDeclaration methodDeclaration = identifyASTNode.getMethodDeclaration();
    methodDeclaration = (MethodDeclaration)ASTNode.copySubtree(ast, methodDeclaration);

    type.bodyDeclarations().add(methodDeclaration);

    unit.types().add(type);

    writeToFile(unit.toString());
}