Enforced Folder Structure in Java for Uploaded Files

I am looking to create a system where a clearly-defined local filesystem folder structure follows a specific pattern. Programmatically or manually violating the pattern should throw an exception.

For example:

company/
  |
  ---> building/
           |
           ----> images/
           |        |
           |        --->image.jpg
           |
           |---> issues/
                    |
                    -----> current/
                    |
                    -----> archive/

The pattern above is simplified vs. reality (imagine 7 levels deep and wide).

My thinking is that I can use Junit to make sure the pattern is met. I started writing some custom code with the Paths API in Java 7 over Spring MVC, though it seems like there has to be a faster way that's less error prone. (Some framework already created? Visitor design pattern?) I would want the application to enforce the pattern rather than the OS or an external script.

Admins: I'll happily remove this question if it's deemed not constructive. I looked around stackoverflow and didn't find a suitable answer.