class MagazinModelAdmin extends ModelAdmin {

static $managed_models = array(
'ContentDataObject'
);

static $url_segment = 'eosmagazin'; // will be linked as /admin/products
static $menu_title = 'Magazin Content Manager';

}

$fields = new FieldSet(
         new TabSet("Root",
            new TabSet("Content",
               new Tab('Main',
                  new PopupDateTimeField("ShowOn", "Erscheinungsdatum"),
                  new PopupDateTimeField("HideOn", "Ausblendungdatum"),
                  new CheckboxField("Disabled", "Verstecken"),
                  new DropdownField("ClassName", 'Content Type', $this->getContentTypeClasses('ContentDataObject')),
                  new TextField("Title", "Titel"),
                  new TextField("Subtitle", "Untertitel"),
                  new CategorizationSetField("Categories", "Kategorien", $contentList),
                  new TextareaField("Teaser", 'Teaser'),
                  new ImageField("TeaserImage", "TeaserBild"),
                  new HtmlEditorField("Text", 'Text'),
                  new TextField("Author", "Autor vom Magazin-Artikel")
               )
            )
         )
      );