Bug 297731 [Filters] We could have IResourceFilterDescription#delete instead of IContainer#removeFilter ?
This is the pattern used for resource markers. It is just a minor issue, however would make new API look more consistent.
bundles/org.eclipse.ui.ide/src/org/eclipse/ui/internal/ide/dialogs/ResourceFilterGroup.java
public void widgetDefaultSelected(SelectionEvent e) {
			}
			public void widgetSelected(SelectionEvent e) {
				FilterTypeUtil.setValue(filter, FilterTypeUtil.TARGET,
						new Integer(1));
			}
		});
		filesAndFoldersButton.addSelectionListener(new SelectionListener() {
			public void widgetDefaultSelected(SelectionEvent e) {
			}
			public void widgetSelected(SelectionEvent e) {
				FilterTypeUtil.setValue(filter, FilterTypeUtil.TARGET,
						new Integer(2));
			}
		});
		filesButton.setSelection(((Integer) FilterTypeUtil.getValue(filter,
				FilterTypeUtil.TARGET)).intValue() == 0);
		foldersButton.setSelection(((Integer) FilterTypeUtil.getValue(filter,
				FilterTypeUtil.TARGET)).intValue() == 1);
		filesAndFoldersButton.setSelection(((Integer) FilterTypeUtil.getValue(
				filter, FilterTypeUtil.TARGET)).intValue() == 2);
	}
	Label addLabel(Composite composite, String text) {
		String delimiter = ":"; 
		Font font = composite.getFont();
		Label label = new Label(composite, SWT.LEFT);
		label.setText(text + delimiter);
		GridData data = new GridData(SWT.LEFT, SWT.CENTER, false, false);
		label.setLayoutData(data);
		label.setFont(font);