i was going through the MVC tutorial and, in Chapter 5, hsqldb simple jar DB engine is used. i was just curious where the data files are that it persists into because it does persist between sessions (the data saved in a previous session still is there when the server is bounced) ?? the only files that appear in the directory from which i start hsqldb are:

<dbname>.lck
<dbname>.log
<dbname>.properties

but they are all text files and the data that i am saving is not written into them. basically, my question is where are the hsqldb data files stored on disk ??