Append Custom Tags in Swagger.yaml using swagger-maven plugin

Question

I am using swagger-maven plugin to generate swagger.yaml for a spring boot 2 application. The plugin works fine for the default feilds like info, description,vender extension etc.

However, I need to append some custom yaml to the generated swagger.yaml. ex:

X-client-integration
Name:test
Package: test package
Catalogs:
-id: x
Seq:1
-id:y
Seq:2

This appended yaml can be hard coded or copied from a file from a project.

Is there any way to achieve this?