Jan, danke schoen for the idea, but it still import the org.adempiere.base package which hits the cyclic dependency during plugin export wizard:
A cycle was detected when generating the classpath org.libero.manufacturing_3.0.0.201502260432, org.adempiere.base_3.0.0.201502260432, org.apache.activemq.activemq-core_5.7.0, org.adempiere.report.jasper.library_3.0.0.201502260432, org.adempiere.base_3.0.0.201502260432.
My MANIFEST after using your idea is now:
Require-Bundle: org.adempiere.ui;bundle-version="2.0.0"
Import-Package: org.adempiere.base,
org.adempiere.base.event,
org.adempiere.exceptions,
org.adempiere.model,
org.compiere,
org.compiere.acct,
org.compiere.model,
org.compiere.process,
org.compiere.util,
org.compiere.wf,
org.eevolution.model,
org.jfree.data.category,
org.osgi.service.event;version="1.3.0"
Required