AbstractSavable unregister called in save()!

I had exactly the same issue with AbstractSavable (Netbeans 8.1) and tried the same workarounds,... Now I found this post and I know I'm not the only one :-)

When user cancels the save operation in JFileChooser I throw an IOException("Save operation cancelled by user"). It displays an unnecessary warning dialog, but at least it keeps my code simple...