NullPointerException in KieModuleMetaDataImpl.init

When creating certain types of assets in the gui, user gets an error modal: "Unable to complete your request. The following exception occurred: null."
The asset is created, but cannot be loaded (reopening results in the same error).
It seems that the newly created asset can be loaded after a project build.

Editors/assets affected are:
guided rules, guided rule templates, drl, guided score cards, guided dtables, guided decision trees, test scenarios
(others - enumerations, dsl, process definitions, ... are okay)

It might not be reproducible with drools-wb (based on irc conversations with wmedvede@redhat.com).

Server log points to DMO:
Caused by: java.lang.NullPointerException
at org.kie.scanner.KieModuleMetaDataImpl.init(KieModuleMetaDataImpl.java:147)
at org.kie.scanner.KieModuleMetaDataImpl.<init>(KieModuleMetaDataImpl.java:87)
at org.kie.scanner.KieModuleMetaData$Factory.newKieModuleMetaData(KieModuleMetaData.java:45)
at org.kie.workbench.common.services.datamodel.backend.server.cache.LRUDataModelOracleCache.loadEnumsForPackage(LRUDataModelOracleCache.java:171)

Stacktrace to be found at http://pastebin.test.redhat.com/299022.