Custom file template for C files

I want to create author header for C file in CLion (it use Apache Velocity template language) wich looks like this:

/****************************************/
/* ${FILE_NAME}                        */
/*                                               */
/* By: ${USER}                           */
/*                                               */
/* Created: ${DATE} by ${USER}  */
/* Updated: ${??} by ${USER}      */
/*                                               */
/***************************************/

There are two problems:
1. How to add Updated date and how can I change it format?
2. I want to fix the width of header, now its width varies depending on length of the FILE_NAME and USER. How can I fix it?

CLion 2018.3.3
Linux 4.15.0-43-generic