How to easily add menus & actions to jface/swt viewers - adding a table row

Assume you created a nice new empty table to be filled by a user.
And let's say you created a first empty row with two columns.

List elements = new ArrayList();

TableViewer tViewer = new TableViewer(parent, SWT.MULTI);
        table = tViewer.getTable();
        table.setLayoutData(new GridData(GridData.FILL_BOTH));
        table.setHeaderVisible(true);
        table.setLinesVisible(true);
        TableLayout layout = new TableLayout();
        layout.addColumnData(new ColumnWeightData(50, true));
        layout.addColumnData(new ColumnWeightData(50, true));
        table.setLayout(layout);
        TableColumn dateColumn = new TableColumn(table, SWT.LEFT);
        dateColumn.setText("DATE");
        TableColumn dischargeColumn = new TableColumn(table, SWT.LEFT);
        dischargeColumn.setText("DISCHARGE");
        TableLabelProvider sLP = new TableLabelProvider(); // implement this yourself
        tViewer.setLabelProvider(sLP);
        tViewer.setContentProvider(new ArrayContentProvider());
// the empty row
elements.add(new String[]{"", ""});
// set the input
tViewer.setInput(elements);

what to do very quickly to add a new row?
After fiddling a bit around with listeners and such stuff, I decided to exploit the menus:

        // add a popup for new rows
        MenuManager popManager = new MenuManager();
        IAction menuAction = new NewRowAction();
        popManager.add(menuAction);
        Menu menu = popManager.createContextMenu(table);
        table.setMenu(menu);

And how easy is the creation of the action?
Like that:

    private class NewRowAction extends Action {
        public NewRowAction() {
            super("Add a new row");
        }
        public void run() {
            elements.add(new String[]{"", ""});
            tViewer .refresh();
        }
    }

et voila', right-click on the table and tell it to add the new row.