String[] buttonLabels = new String[] { NewWizardMessages.NewVariableEntryDialog_vars_extend, };
VariablesAdapter adapter = new VariablesAdapter();
BPVariableElementLabelProvider labelProvider = new BPVariableElementLabelProvider(
false);
fVariablesList = new ListDialogField(adapter, buttonLabels,
labelProvider);
fVariablesList.setDialogFieldListener(adapter);