temp jar files not deleted after server startup

Into startup of a web-app using jenia4faces component library (www.jenia.org), the class FacesConfigurator (method feedJarConfig) create a temp copy of the jenia4faces jar (a myfacesXXXX.jar into tomcat/temp-dir).
After processing of "META-INF/faces-config.xml" into the temporary jar, the file should be deleted but this DOES NOT HAPPEN.
No Exception is throw by myfaces but the file-system size increase.
A possibile cause is that the jenia4faces faces-config.xml includes other portion of XML by using the <!ENTITY popup SYSTEM "jenia-popup-config.xml"> into DOCTYPE declaration.
It is possible (but only an idea) that if included files are not closed, than the jar can not be deleted.

Andrea Tessaro Porta
Founder Member of jenia.org
http://www.jenia.org