gistfile1.txt

After import eclipse might complain about different java facets version.

Solution: In the properties of the affected project, choose Project Facets on the left side and change the Java version to use to 1.6
-persistence-test project displays a high number of various errors after import

no solution, but apparently not necessary to run the project
After trying to refactor the project names, an XML Problem (Attribute "xmlns" was already specified for element "web-app".) appears for -Web project

Solution: remove one xmlns definition in line 2 of the web.xml
At server startup, it might complain in the console about missing hsql dependencies

Solution: Provide the Datasource as described in the exercise 1 sheet in the wildfly admin menu. Also: Wildfly might disable data sources after a while by somehow removing the hsqldb.jar... re-uploading this file and re-enabling the datasource helps