i'm getting the error missing return statement

[siva sankara rao]

import org.apache.struts.action.*;
import javax.servlet.http.*;
import java.sql.*;
//package one;

public class ContSaveAction extends Action
{
public ActionForward execute(ActionForm form,ActionMapping mapping,HttpServletRequest request,HttpServletResponse response) throws Exception
{
ContSaveForm cf=(ContSaveForm)form;
String contcode,contname;
contcode=cf.getContCode();
contname=cf.getContName();

try{

//ResultSet rs;
Class.forName("oracle.jdbc.driver.OracleDriver");
Connection con=DriverManager.getConnection("jdbc racle:thin:@localhost:wsoft","user","pass");
Statement stmt=con.createStatement();

int b=0;
b=stmt.executeUpdate("insert into RWS_CONTAMINATION_TBL values('"+contcode+"','"+contname+"')");
if(b!=0)
return mapping.findForward("loaded");


}catch(Exception e)
{
System.out.println("Exception due to:"+e);
}


/*else
return mapping.findForward("error"); */
}
}