fSpecifierViewer.setContentProvider(new ComboContentProvider());
fSpecifierViewer.setLabelProvider(new ComboLabelProvider());
fSpecifierViewer.setInput(fCondition.getField());
/* Select the Condition's Specifier */
fSpecifierViewer.setSelection(new StructuredSelection(fCondition.getSpecifier()));
/* Listen to Selection Changes in the Field-Viewer */
fFieldViewer.addSelectionChangedListener(new ISelectionChangedListener() {
public void selectionChanged(SelectionChangedEvent event) {
IStructuredSelection selection = (IStructuredSelection) event.getSelection();