rmdirSyncRecursive: Keep folder, but remove subtree?

[IngwiePhoenix]

I am needing to clear the contents of a folder before my app launches. As the permissions are normally -rw-rw-rw i can't chmod it, it seems...but I can remove it. But the documentation reads, that it will also remove the directory whose sub-tree was removed. How can I ensure that this won't happen?

Kind regards, Ingwie