Nitrite/Java: Export leads to ClassNotFoundException

[Nalaxon]

Hi,
I don't understand how to get export to work, when using Model classes.

To reproduce my issue i created a minimal example: https://github.com/Nalaxon/nitride-db-test

What I try:
We have some Model classes for Measurements, that we handle in an repository.
When I try to export the repository I get: Caused by: java.lang.ClassNotFoundException: com.playground.exportTest.model.Measurement+id

java -classpath .\build\libs\nitride-db-test-1.0-SNAPSHOT.jar com.playground.exportTest.Application
Exception in thread "main" org.dizitart.no2.exceptions.NitriteIOException: NO2.2011: error while exporting data
        at org.dizitart.no2.tool.Exporter.exportTo(Exporter.java:147)
        at org.dizitart.no2.tool.Exporter.exportTo(Exporter.java:123)
        at org.dizitart.no2.tool.Exporter.exportTo(Exporter.java:109)
        at org.dizitart.no2.tool.Exporter.exportTo(Exporter.java:86)
        at com.playground.exportTest.Application.main(Application.java:27)
Caused by: java.lang.ClassNotFoundException: com.playground.exportTest.model.Measurement+id
        at java.base/jdk.internal.loader.BuiltinClassLoader.loadClass(BuiltinClassLoader.java:582)
        at java.base/jdk.internal.loader.ClassLoaders$AppClassLoader.loadClass(ClassLoaders.java:190)
        at java.base/java.lang.ClassLoader.loadClass(ClassLoader.java:499)
        at java.base/java.lang.Class.forName0(Native Method)
        at java.base/java.lang.Class.forName(Class.java:291)
        at org.dizitart.no2.tool.NitriteJsonExporter.exportData(NitriteJsonExporter.java:70)
        at org.dizitart.no2.tool.Exporter.exportTo(Exporter.java:145)
        ... 4 more

Maybe I don't understand something wrong on how I have to configure classpath
I did some googlling and tried several things, but I wasn't able to make it work :(

So any pointers in the right direction would be highly appreciated.

Thank you very much in advance