Here’s a tip for initializing your plugins or any other singleton-like repository only when needed. Consider a code like this: if (isConfigurable()) { Bundle bundleCopy = bundle; Preferences[] preferencesCopy = new Preferences[1]; preferencesCopy[0] = new org.eclipse.core.internal. preferences.legacy.PreferenceForwarder( this, bundleCopy.getSymbolicName()); return preferencesCopy; } return null; Do you see what’s wrong there? The problem is that if [...]