Hi,
If you want to convert CSV to XML, you can use message transform bean for this. I assume you don't want to just pick & drop the file without transformation. Here is the link for this bean:
http://help.sap.com/saphelp_nw04/helpdata/en/24/4cad3baabd4737bab64d0201bc0c6c/content.htm
Also go through:
https://scn.sap.com/thread/1743443
http://scn.sap.com/thread/1484546
If you have a pick & drop scenario with no transformation logic, you can avoid ESR objects & then no need of this message transform bean.