how to add custom predefined permission scheme to my jira plugin?

[smhf97]

Hi everyone, 
I'm trying to create a predefined permission scheme for my plugin. I found the definition of default permission scheme in startupdatabase.xml file:

But I can't add another one. Because apparently this file is recreated at the start of my local jira server. And adding this line to atlassian-plugin.xml did not do anything.

Thanks!