Reworked DatabaseService API.
Initial implementation of LockManager.
diff --git a/core/api/src/main/java/org/onlab/onos/store/service/ReadStatus.java b/core/api/src/main/java/org/onlab/onos/store/service/ReadStatus.java
new file mode 100644
index 0000000..2039a1c
--- /dev/null
+++ b/core/api/src/main/java/org/onlab/onos/store/service/ReadStatus.java
@@ -0,0 +1,6 @@
+package org.onlab.onos.store.service;
+
+public enum ReadStatus {
+	OK,
+	NO_SUCH_TABLE
+}