Save a UserSimilarity in a File

[Nikolaos Romanos Katsipoulakis]

Hey guys,
In my recommender i need to save my UserSimilarity 
(CachingUserSimilarity to be exact) in a file, and whenever I get a 
request for a recommendation, i need to load it from a file, retrieve 
the recommendation, and then store it back in a file. Can this be done? 
I have seen in the mahout documentation a class FileItemSimilarity, 
which has a constructor that parses the FileItemSimilarity from a file. 
Is there a similar FileUserSimilarity? How is the FileItemSimilarity 
represented in the file?

Thank you