jsf hot to not render plain html files
===

all jsf-files in my project are named *.xhtml and i have configured the servlet like this:

      <servlet-mapping>
        <servlet-name>Faces Servlet</servlet-name>
        <url-pattern>*.html</url-pattern>
      </servlet-mapping>
      <servlet-mapping>
        <servlet-name>Faces Servlet</servlet-name>
        <url-pattern>*.xhtml</url-pattern>
      </servlet-mapping>

So they can be accessed as .html and .xhtml in url. 
Now i have some plain html files saved as *.html. How can i configure that files named with *.html are not rendered?

or is there a possibility to exclude directorys for jsf?