I decided to test IntegraTUM Web Disk which can provide a web interface to Samba shares, and just to get a demo working I did the following – these are not necessarily the best options for actual deployment.
The first problem I had with this app was setting the tmp directory and I eventually used:
                <param-name>uploadpath</param-name>
                <param-value>tmp</param-value>
And created that directory under:

mkdir /usr/share/tomcat6/webapps/ba/webapp/WEB-INF/tmp
chmod 777 /usr/share/tomcat6/webapps/ba/webapp/WEB-INF/tmp

While trying to get a test version of this running I got the following error.

HTTP Status 500 –

---

type Exception report

message

description The server encountered an internal error () that prevented it from fulfilling this request.

exception

javax.servlet.ServletException: Could not initialize class jcifs.Config
	org.apache.catalina.security.SecurityUtil.execute(SecurityUtil.java:324)
	org.apache.catalina.security.SecurityUtil.doAsPrivilege(SecurityUtil.java:162)
	org.apache.catalina.security.SecurityUtil.doAsPrivilege(SecurityUtil.java:115)
	org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:102)
	org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:293)
	org.apache.coyote.http11.Http11Processor.process(Http11Processor.java:849)
	org.apache.coyote.http11.Http11Protocol$Http11ConnectionHandler.process(Http11Protocol.java:583)
	org.apache.tomcat.util.net.JIoEndpoint$Worker.run(JIoEndpoint.java:454)
	java.lang.Thread.run(Thread.java:636)

Being a tomcat newbie I decided to (do the wrong thing and) set TOMCAT6_SECURITY=no

vi /etc/default/tomcat6

Restarting tomcat6 brought the application up so I can test it. I could then set about configuring it with:

vi /usr/share/tomcat6/webapps/ba/webapp/WEB-INF/web.xml

The right thing would probably be to give the jar permissions.