import org.eclipse.linuxtools.internal.tmf.core.statesystem.backends.IStateHistoryBackend;
import org.eclipse.linuxtools.tmf.core.exceptions.AttributeNotFoundException;
import org.eclipse.linuxtools.tmf.core.exceptions.StateValueTypeException;
import org.eclipse.linuxtools.internal.tmf.core.statesystem.backends.IStateHistoryBackend;
import org.eclipse.linuxtools.tmf.core.exceptions.AttributeNotFoundException;
import org.eclipse.linuxtools.tmf.core.exceptions.StateValueTypeException;