Internal packages across the openshift plugins are non-consistent:

ex.
org.jboss.tools.openshift.client: org.jboss.tools.openshift.client.internal
org.jboss.tools.openshift.express.client: org.jboss.tools.openshift.express.client.internal

the base is imho org.jboss.tools.openshift and thus internal packages should always be at org.jboss.tools.openshift.internal across plugins.
For reference, here's the official Eclipse documentation on the topic: http://wiki.eclipse.org/index.php/Naming_Conventions#Java_Packages

org.eclipse.jdt.internal.core.compiler - Correct usage
org.eclipse.jdt.core.internal.compiler - Incorrect. internal should immediately follow subproject name.
org.eclipse.core.internal.resources - Correct usage
org.eclipse.internal.core.resources - Incorrect. internal should never immediately follow org.eclipse.
org.eclipse.core.resources.internal - Incorrect. internal should immediately follow Eclipse Platform component name.