diff --git a/src/main/java/net/onrc/onos/core/flowmanager/FlowOperationMap.java b/src/main/java/net/onrc/onos/core/flowmanager/FlowOperationMap.java
index 744c65e..e9d66c3 100644
--- a/src/main/java/net/onrc/onos/core/flowmanager/FlowOperationMap.java
+++ b/src/main/java/net/onrc/onos/core/flowmanager/FlowOperationMap.java
@@ -1,8 +1,49 @@
 package net.onrc.onos.core.flowmanager;
 
+import net.onrc.onos.api.flowmanager.FlowBatchHandle;
+import net.onrc.onos.api.flowmanager.FlowBatchId;
+import net.onrc.onos.api.flowmanager.FlowBatchOperation;
+import net.onrc.onos.api.flowmanager.FlowBatchState;
+
 /**
  * Manages the set of flow operations throughout the ONOS instances.
  */
 public class FlowOperationMap {
-    // TODO implement it
+    public FlowBatchHandle putOperation(FlowBatchOperation ops) {
+        FlowBatchId id = getUniqueBatchOperationId();
+        if (id == null) {
+            return null;
+        }
+        if (putBatchOperation(id, ops)) {
+            return null;
+        }
+
+        return new FlowBatchHandle(this, id);
+    }
+
+    public void setState(long id, FlowBatchState state) {
+        // TODO implement it
+    }
+
+    public FlowBatchOperation getOperation(long id) {
+        // TODO implement it
+        return null;
+    }
+
+    public FlowBatchState getState(FlowBatchId id) {
+        // TODO implement it
+        return null;
+    }
+
+    // ====== private methods
+
+    private FlowBatchId getUniqueBatchOperationId() {
+        // TODO implement it
+        return null;
+    }
+
+    private boolean putBatchOperation(FlowBatchId id, FlowBatchOperation ops) {
+        // TODO implement it
+        return false;
+    }
 }