Assuming you mean you want a file based data store, yes, quite
possible. You can store the text files in a directory, and when your
application runs, it can scan the files and build a link in your web
page that will cause your web application to then display the
appropriate file, while still keeping the look and feel of your site.
I'd personally not do the whole Rails thing for something like this;
you might look at Sintra or Merb instead.