import java.util.List;
import java.util.concurrent.ExecutionException;
import java.util.concurrent.Future;
-import javax.annotation.Nullable;
+import org.eclipse.jdt.annotation.Nullable;
import org.opendaylight.controller.md.sal.binding.api.DataBroker;
import org.opendaylight.controller.md.sal.common.api.data.LogicalDatastoreType;
import org.opendaylight.genius.infra.Datastore.Configuration;