Datetime fields with MSSQL only works with java.util.Date not with java.util.Calendar in JSF

I tried the reverse engineering with MSSQL Express 8 and the datetime fields were generated as Calendar type, thats looks good. After that I prepared the project to run in jsf, but when I run and want to create a new record with datetime fields, I click on the save button and nothing happens. Finally I found that the issue is the type Calendar with JSF, because Calendar with MVC works fine.

Is there a way to change the automatic translation from Calendar to Date in reverse engineering? This is a workaround but this is enough for me.