The custom plug-ins you create to define custom execute match logic must extend the ExecuteMatchLogics class. In addition, the following classes must be imported into the custom plug-in.
com.stc.eindex.objects.SystemObject
com.stc.eindex.objects.EnterpriseObject
com.stc.eindex.objects.exception.ObjectException
com.stc.eindex.master.ExecuteMatchLogics
com.stc.eindex.master.CustomizationException