Would this method be good to encrypt configuration files?

So, I'm thinking if we should create a custom C++ application called the DiamondCreeper Services Configuration Registry Value (.dcscrvf) and only our servers have this software installed so that only Java plugin installed and only we can read or amend the values within the file, so that even if a hacker tries to read confidential information such as database details from configuration files, they are unable to because they don't have our software that can read or amend the values. But I'm wondering if this would be a good idea?

Thanks,
TurtlesBeast23

 

Oh, it also asks for the password before the file can be opened, so basically the only way to read the data is by brute force or unavoidable hacks Also, I'm going to fork Bukkit so that all the configuration is stored in a folder named "registry" and the folder is locked so that it requires the administrator credentials to be entered to continue