This is a fine one: if you only do have XML and nothing else, you can generate an XSD from the XML (here) and use the XSD to generate your Java POJOS.
I am currently forced to use windows, so I will use this example.
Download jaxb-ri-2.3.0 (Version may differ for you, what ever is the newest version).
Open CMD window and change to the directory jaxb-ri-2.3.0\jaxb-ri\bin
Copy your XSD into the folder and type:
xjc.bat <yourfile.xsd> -d <yourDirectory>
And your POJOs will be generated, ready to use.
Sometimes Docker will simply claim to much space. Time for a clean up ;) docker system prune -a -f
Sometimes a file does not differ from the repository version. But GIT shows it as modified and does not accept a revert. This file, howev...
Just create a package-info.java file for your package in which you have your POJO: @javax.xml.bind.annotation.XmlSchema(namespace = "...