header = new HeaderPart();
header.setAuthor(currentUser.getEmail());
menu = new MenuPart();
toolbar = new ToolbarPart();
editor = new EditorPart();
previewer = new PreviewerPart();
VerticalPanel headerPanel = new VerticalPanel();
headerPanel.setWidth("100%");
headerPanel.add(header);
headerPanel.add(menu);
headerPanel.add(toolbar);