Stopping the physical removal of empty folders...

Hi All-

I've been using slide for some time now with a FileStore (linux) and a J2EE 
Store (backed by an Oracle DB).

Currently when I delete all the files from a folder, the physical folder is 
removed from the file system. This is ok for most of my folders, but I have 
a few specific cases where if a folder has no files in it, I still need the 
folder to exist on the file system...

Short from adding a file that can't be deleted to the folder, how can I 
keep certain folders from ever being deleted once they have been created...?

Does the recursive delete happen in the content store? or is it a result of 
some other action?

any info on where to start looking would be greatly appreciated..


Thanks

Jeff