Several quickstarts are using multiple java packages, for example:

cmt quickstart has:

org/jboss/as/quickstarts/cmt package prefix for source classes
org/jboss/as/quickstarts/cmt package prefix for two test classes
org/wildfly/quickstarts/cmt package prefix for other test class

or helloworld quickstart:
org/jboss/as/quickstarts/helloworld prefix for source classes
org/wildfly/quickstarts/helloworld package prefix for test classes

In total, 5 different package prefixes are used across all quickstarts:
org/jboss/as/quickstart
org/jboss/as/quickstarts
org/jboss/quickstart
org/jboss/quickstarts
org/wildfly/quickstarts

While it doesn't affect functionality, it doesn't look good and there is no reason why those can't be synced on one common prefix