exposed packages of metamodel explorer
diff --git a/eclipse-tools/emf-graphical-viewer/plugins/org.eclipse.app4mc.emfutils.metamodelviewer/META-INF/MANIFEST.MF b/eclipse-tools/emf-graphical-viewer/plugins/org.eclipse.app4mc.emfutils.metamodelviewer/META-INF/MANIFEST.MF
index 76b2e7e..a858225 100644
--- a/eclipse-tools/emf-graphical-viewer/plugins/org.eclipse.app4mc.emfutils.metamodelviewer/META-INF/MANIFEST.MF
+++ b/eclipse-tools/emf-graphical-viewer/plugins/org.eclipse.app4mc.emfutils.metamodelviewer/META-INF/MANIFEST.MF
@@ -10,3 +10,9 @@
 Bundle-RequiredExecutionEnvironment: JavaSE-1.8
 Bundle-Activator: org.eclipse.app4mc.emfutils.metamodelviewer.base.Activator
 Bundle-ActivationPolicy: lazy
+Export-Package: org.eclipse.app4mc.emfutils.metamodelviewer.base,
+ org.eclipse.app4mc.emfutils.metamodelviewer.dialogs,
+ org.eclipse.app4mc.emfutils.metamodelviewer.preferences,
+ org.eclipse.app4mc.emfutils.metamodelviewer.utils,
+ org.eclipse.app4mc.emfutils.metamodelviewer.views,
+ org.eclipse.app4mc.emfutils.metamodelviewer.views.providers