add commit() and rollback() methods to IDBOperation class.
diff --git a/src/main/java/net/onrc/onos/util/IDBOperation.java b/src/main/java/net/onrc/onos/util/IDBOperation.java
index 6a0d52d..2eeb527 100644
--- a/src/main/java/net/onrc/onos/util/IDBOperation.java
+++ b/src/main/java/net/onrc/onos/util/IDBOperation.java
@@ -37,4 +37,6 @@
public IFlowEntry searchFlowEntry(FlowEntryId flowEntryId);
public Iterable<IFlowEntry> getAllFlowEntries();
public void removeFlowEntry(IFlowEntry flowEntry);
+
+ public IDBConnection getDBConnection();
}