Fix Javadocs to prevent warning during build #227
Description
When running a full build or just the tests with maven, there are a lot of annoying warnings about incorrect Javadocs, e.g. integration-tests/production/../common-test-code/src/main/java/com/vaadin/flow/quarkus/it/routecontext/MasterView.java:39: warning: no comment.
It would be good to fix all of them in one go.