@@ -0,0 +1,219 @@
+package inf.unibz.it.obda.gui.swing.datasource;%0A%0Aimport inf.unibz.it.obda.domain.DataSource;%0A%0Apublic interface DatasourceSelectorListener%0A%7B%0A  public void datasourceChanged(DataSource oldSource, DataSource newSource);%0A%7D%0A

Add datasource listener class.