How to add a new button to the main menu bar using MagicDraw OpenAPI?

I am working with the MagicDraw OpenAPI and would like to add a new button named "TEST" to the main menu bar of MagicDraw, to the right of "Help" button (see image below, I want the button at the red circle).

Here are useful resources

Here is my current code example, when I run the codes, the button I want doesn't appear at all:

public class Main extends Plugin{   
    public void init()
    {
        initialized = true;
        NMAction action = new MyAction("test", "TEST");
        MainMenuConfiguration configurator = new MainMenuConfiguration((MyAction) action);
        ActionsConfiguratorsManager.getInstance().addMainMenuConfigurator(configurator);
    } 
    }
public class MainMenuConfiguration implements AMConfigurator {
    public void configure(ActionsManager actionsManager) {
        ActionsCategory newCategory = new ActionsCategory("idTest", "TEST");
        ActionsManager newManager = new ActionsManager();
        newManager.addCategory(newCategory);

    }
}

Solution

Problem solved by creating a class

public abstract class MainMenuConfigurator implements AMConfigurator {
private final String id;
private final List<NMAction> actions;

public MainMenuConfigurator(String id) {
    this.id = id;
    this.actions = new ArrayList();
}

public void addAction(NMAction action) {
    this.actions.add(action);
}

public void configure(ActionsManager manager) {
    MDActionsCategory category = (MDActionsCategory)manager.getActionFor(this.id);
    if (category == null) {
        category = this.createActionsCategory();
        manager.addCategory(category);
    }

    category.addActions(this.actions);
}

@Nonnull
protected abstract MDActionsCategory createActionsCategory();}

Then extend this class like this

public class MyMainMenu extends MainMenuConfigurator {

public MyMainMenu() {
    super("suchi.main.menu");
}

@Nonnull
protected MDActionsCategory createActionsCategory() {
    MDActionsCategory category = new MDActionsCategory("myID", "TEST");
    category.setNested(true);
    return category;
}

public int getPriority() {return 10;}}

Finally call it

ActionsConfiguratorsManager configurationManager = ActionsConfiguratorsManager.getInstance();
MyMainMenu myMainMenu = new MyMainMenu();
configurationManager.addMainMenuConfigurator(myMainMenu);