hibernate.cfg.xml - blank file

[JMTM]

I have the same problem frequently (but not always) with Netbeans 8.1.

What I've found solves the problem is :

1 - Delete the created hibernate config file.
2 - Exit Nebeans
3 - Launch Netbeans
4 - Create the hibernate config file.

Then it appers properly, with connection data etc, filled in.

I dont know why this happens, or when it happens.