diff --git a/core/store/primitives/src/main/java/org/onosproject/store/primitives/impl/DefaultAsyncAtomicValue.java b/core/store/primitives/src/main/java/org/onosproject/store/primitives/impl/DefaultAsyncAtomicValue.java
index 1d42a97..281ad25 100644
--- a/core/store/primitives/src/main/java/org/onosproject/store/primitives/impl/DefaultAsyncAtomicValue.java
+++ b/core/store/primitives/src/main/java/org/onosproject/store/primitives/impl/DefaultAsyncAtomicValue.java
@@ -34,7 +34,11 @@
 import com.google.common.collect.Maps;
 import org.onosproject.utils.MeteringAgent;
 
-
+/**
+ * Default implementation of a {@code AsyncAtomicValue}.
+ *
+ * @param <V> value type
+ */
 public class DefaultAsyncAtomicValue<V> implements AsyncAtomicValue<V> {
 
     private final String name;
diff --git a/core/store/primitives/src/main/java/org/onosproject/store/primitives/impl/NewDefaultAtomicCounterBuilder.java b/core/store/primitives/src/main/java/org/onosproject/store/primitives/impl/DefaultAtomicCounterBuilder.java
similarity index 87%
rename from core/store/primitives/src/main/java/org/onosproject/store/primitives/impl/NewDefaultAtomicCounterBuilder.java
rename to core/store/primitives/src/main/java/org/onosproject/store/primitives/impl/DefaultAtomicCounterBuilder.java
index 556774e..fdbcf6c 100644
--- a/core/store/primitives/src/main/java/org/onosproject/store/primitives/impl/NewDefaultAtomicCounterBuilder.java
+++ b/core/store/primitives/src/main/java/org/onosproject/store/primitives/impl/DefaultAtomicCounterBuilder.java
@@ -22,11 +22,11 @@
 /**
  * Default implementation of AtomicCounterBuilder.
  */
-public class NewDefaultAtomicCounterBuilder extends AtomicCounterBuilder {
+public class DefaultAtomicCounterBuilder extends AtomicCounterBuilder {
 
     private final DistributedPrimitiveCreator primitiveCreator;
 
-    public NewDefaultAtomicCounterBuilder(DistributedPrimitiveCreator primitiveCreator) {
+    public DefaultAtomicCounterBuilder(DistributedPrimitiveCreator primitiveCreator) {
         this.primitiveCreator = primitiveCreator;
     }
 
diff --git a/core/store/primitives/src/main/java/org/onosproject/store/primitives/impl/NewDefaultConsistentMapBuilder.java b/core/store/primitives/src/main/java/org/onosproject/store/primitives/impl/DefaultConsistentMapBuilder.java
similarity index 90%
rename from core/store/primitives/src/main/java/org/onosproject/store/primitives/impl/NewDefaultConsistentMapBuilder.java
rename to core/store/primitives/src/main/java/org/onosproject/store/primitives/impl/DefaultConsistentMapBuilder.java
index dfef62e..37c45d48 100644
--- a/core/store/primitives/src/main/java/org/onosproject/store/primitives/impl/NewDefaultConsistentMapBuilder.java
+++ b/core/store/primitives/src/main/java/org/onosproject/store/primitives/impl/DefaultConsistentMapBuilder.java
@@ -26,11 +26,11 @@
  * @param <K> type for map key
  * @param <V> type for map value
  */
-public class NewDefaultConsistentMapBuilder<K, V> extends ConsistentMapBuilder<K, V> {
+public class DefaultConsistentMapBuilder<K, V> extends ConsistentMapBuilder<K, V> {
 
     private final DistributedPrimitiveCreator primitiveCreator;
 
-    public NewDefaultConsistentMapBuilder(DistributedPrimitiveCreator primitiveCreator) {
+    public DefaultConsistentMapBuilder(DistributedPrimitiveCreator primitiveCreator) {
         this.primitiveCreator = primitiveCreator;
     }
 
diff --git a/core/store/primitives/src/main/java/org/onosproject/store/primitives/impl/NewDefaultDistributedQueueBuilder.java b/core/store/primitives/src/main/java/org/onosproject/store/primitives/impl/DefaultDistributedQueueBuilder.java
similarity index 78%
rename from core/store/primitives/src/main/java/org/onosproject/store/primitives/impl/NewDefaultDistributedQueueBuilder.java
rename to core/store/primitives/src/main/java/org/onosproject/store/primitives/impl/DefaultDistributedQueueBuilder.java
index eff8e77..47c8628 100644
--- a/core/store/primitives/src/main/java/org/onosproject/store/primitives/impl/NewDefaultDistributedQueueBuilder.java
+++ b/core/store/primitives/src/main/java/org/onosproject/store/primitives/impl/DefaultDistributedQueueBuilder.java
@@ -28,15 +28,13 @@
  *
  * @param <E> queue entry type
  */
-public class NewDefaultDistributedQueueBuilder<E> implements DistributedQueueBuilder<E> {
+public class DefaultDistributedQueueBuilder<E> implements DistributedQueueBuilder<E> {
 
     private final DistributedPrimitiveCreator primitiveCreator;
     private String name;
-    private boolean persistenceEnabled = true;
-    private boolean metering = true;
     private Serializer serializer;
 
-    public NewDefaultDistributedQueueBuilder(DistributedPrimitiveCreator primitiveCreator) {
+    public DefaultDistributedQueueBuilder(DistributedPrimitiveCreator primitiveCreator) {
         this.primitiveCreator = primitiveCreator;
     }
 
@@ -54,18 +52,6 @@
         return this;
     }
 
-    @Override
-    public DistributedQueueBuilder<E> withMeteringDisabled() {
-        metering = false;
-        return this;
-    }
-
-    @Override
-    public DistributedQueueBuilder<E> withPersistenceDisabled() {
-        persistenceEnabled = false;
-        return this;
-    }
-
     private boolean validInputs() {
         return name != null && serializer != null;
     }
diff --git a/core/store/primitives/src/main/java/org/onosproject/store/primitives/impl/NewDefaultTransactionContext.java b/core/store/primitives/src/main/java/org/onosproject/store/primitives/impl/DefaultTransactionContext.java
similarity index 95%
rename from core/store/primitives/src/main/java/org/onosproject/store/primitives/impl/NewDefaultTransactionContext.java
rename to core/store/primitives/src/main/java/org/onosproject/store/primitives/impl/DefaultTransactionContext.java
index e9e75a5..be9ead4 100644
--- a/core/store/primitives/src/main/java/org/onosproject/store/primitives/impl/NewDefaultTransactionContext.java
+++ b/core/store/primitives/src/main/java/org/onosproject/store/primitives/impl/DefaultTransactionContext.java
@@ -32,7 +32,7 @@
 /**
  * Default implementation of transaction context.
  */
-public class NewDefaultTransactionContext implements TransactionContext {
+public class DefaultTransactionContext implements TransactionContext {
 
     private final AtomicBoolean isOpen = new AtomicBoolean(false);
     private final DistributedPrimitiveCreator creator;
@@ -41,7 +41,7 @@
     private final Set<TransactionParticipant> txParticipants = Sets.newConcurrentHashSet();
     private final MeteringAgent monitor;
 
-    public NewDefaultTransactionContext(TransactionId transactionId,
+    public DefaultTransactionContext(TransactionId transactionId,
             DistributedPrimitiveCreator creator,
             TransactionCoordinator transactionCoordinator) {
         this.transactionId = transactionId;
diff --git a/core/store/primitives/src/main/java/org/onosproject/store/primitives/impl/NewDefaultTransactionContextBuilder.java b/core/store/primitives/src/main/java/org/onosproject/store/primitives/impl/DefaultTransactionContextBuilder.java
similarity index 87%
rename from core/store/primitives/src/main/java/org/onosproject/store/primitives/impl/NewDefaultTransactionContextBuilder.java
rename to core/store/primitives/src/main/java/org/onosproject/store/primitives/impl/DefaultTransactionContextBuilder.java
index 7d4e22e..1704bb2 100644
--- a/core/store/primitives/src/main/java/org/onosproject/store/primitives/impl/NewDefaultTransactionContextBuilder.java
+++ b/core/store/primitives/src/main/java/org/onosproject/store/primitives/impl/DefaultTransactionContextBuilder.java
@@ -22,13 +22,13 @@
 /**
  * Default Transaction Context Builder.
  */
-public class NewDefaultTransactionContextBuilder extends TransactionContextBuilder {
+public class DefaultTransactionContextBuilder extends TransactionContextBuilder {
 
     private final TransactionId transactionId;
     private final DistributedPrimitiveCreator primitiveCreator;
     private final TransactionCoordinator transactionCoordinator;
 
-    public NewDefaultTransactionContextBuilder(TransactionId transactionId,
+    public DefaultTransactionContextBuilder(TransactionId transactionId,
             DistributedPrimitiveCreator primitiveCreator,
             TransactionCoordinator transactionCoordinator) {
         this.transactionId = transactionId;
@@ -38,7 +38,7 @@
 
     @Override
     public TransactionContext build() {
-        return new NewDefaultTransactionContext(transactionId,
+        return new DefaultTransactionContext(transactionId,
                 primitiveCreator,
                 transactionCoordinator);
     }
diff --git a/core/store/primitives/src/main/java/org/onosproject/store/primitives/impl/MutexExecutionManager.java b/core/store/primitives/src/main/java/org/onosproject/store/primitives/impl/MutexExecutionManager.java
deleted file mode 100644
index bc45d68..0000000
--- a/core/store/primitives/src/main/java/org/onosproject/store/primitives/impl/MutexExecutionManager.java
+++ /dev/null
@@ -1,317 +0,0 @@
-/*
- * Copyright 2015 Open Networking Laboratory
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *     http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-package org.onosproject.store.primitives.impl;
-
-import static org.slf4j.LoggerFactory.getLogger;
-
-import java.util.Arrays;
-import java.util.List;
-import java.util.Map;
-import java.util.concurrent.CompletableFuture;
-import java.util.concurrent.Executor;
-
-import org.apache.felix.scr.annotations.Activate;
-import org.apache.felix.scr.annotations.Component;
-import org.apache.felix.scr.annotations.Deactivate;
-import org.apache.felix.scr.annotations.Reference;
-import org.apache.felix.scr.annotations.ReferenceCardinality;
-import org.apache.felix.scr.annotations.Service;
-import org.onlab.util.Tools;
-import org.onosproject.cluster.ClusterEvent;
-import org.onosproject.cluster.ClusterEventListener;
-import org.onosproject.cluster.ClusterService;
-import org.onosproject.cluster.ControllerNode.State;
-import org.onosproject.cluster.NodeId;
-import org.onosproject.store.serializers.KryoNamespaces;
-import org.onosproject.store.service.ConsistentMap;
-import org.onosproject.store.service.ConsistentMapException;
-import org.onosproject.store.service.MapEvent;
-import org.onosproject.store.service.MapEventListener;
-import org.onosproject.store.service.MutexExecutionService;
-import org.onosproject.store.service.MutexTask;
-import org.onosproject.store.service.Serializer;
-import org.onosproject.store.service.StorageService;
-import org.onosproject.store.service.Versioned;
-import org.slf4j.Logger;
-
-import com.google.common.base.MoreObjects;
-import com.google.common.collect.Lists;
-import com.google.common.collect.Maps;
-import static org.onosproject.security.AppGuard.checkPermission;
-import static org.onosproject.security.AppPermission.Type.MUTEX_WRITE;
-/**
- * Implementation of a MutexExecutionService.
- */
-@Component(immediate = true)
-@Service
-public class MutexExecutionManager implements MutexExecutionService {
-
-    private final Logger log = getLogger(getClass());
-
-    protected ConsistentMap<String, MutexState> lockMap;
-    protected NodeId localNodeId;
-
-    @Reference(cardinality = ReferenceCardinality.MANDATORY_UNARY)
-    protected ClusterService clusterService;
-
-    @Reference(cardinality = ReferenceCardinality.MANDATORY_UNARY)
-    protected StorageService storageService;
-
-    private final MapEventListener<String, MutexState> mapEventListener = new InternalLockMapEventListener();
-    private final ClusterEventListener clusterEventListener = new InternalClusterEventListener();
-
-    private Map<String, CompletableFuture<MutexState>> pending = Maps.newConcurrentMap();
-    private Map<String, InnerMutexTask> activeTasks = Maps.newConcurrentMap();
-
-    @Activate
-    public void activate() {
-        localNodeId = clusterService.getLocalNode().id();
-        lockMap = storageService.<String, MutexState>consistentMapBuilder()
-                    .withName("onos-mutexes")
-                    .withSerializer(Serializer.using(Arrays.asList(KryoNamespaces.API), MutexState.class))
-                    .withPartitionsDisabled()
-                    .build();
-        lockMap.addListener(mapEventListener);
-        clusterService.addListener(clusterEventListener);
-        releaseOldLocks();
-        log.info("Started");
-    }
-
-    @Deactivate
-    public void deactivate() {
-        lockMap.removeListener(mapEventListener);
-        pending.values().forEach(future -> future.cancel(true));
-        activeTasks.forEach((k, v) -> {
-            v.stop();
-            unlock(k);
-        });
-        clusterService.removeListener(clusterEventListener);
-        log.info("Stopped");
-    }
-
-    @Override
-    public CompletableFuture<Void> execute(MutexTask task, String exclusionPath, Executor executor) {
-        checkPermission(MUTEX_WRITE);
-        return lock(exclusionPath)
-                    .thenApply(state -> activeTasks.computeIfAbsent(exclusionPath,
-                                                                    k -> new InnerMutexTask(exclusionPath,
-                                                                                            task,
-                                                                                            state.term())))
-                    .thenAcceptAsync(t -> t.start(), executor)
-                    .whenComplete((r, e) -> unlock(exclusionPath));
-    }
-
-    protected CompletableFuture<MutexState> lock(String exclusionPath) {
-        CompletableFuture<MutexState> future =
-                pending.computeIfAbsent(exclusionPath, k -> new CompletableFuture<>());
-        tryLock(exclusionPath);
-        return future;
-    }
-
-    /**
-     * Attempts to acquire lock for a path. If lock is held by some other node, adds this node to
-     * the wait list.
-     * @param exclusionPath exclusion path
-     */
-    protected void tryLock(String exclusionPath) {
-        Tools.retryable(() -> lockMap.asJavaMap()
-                                     .compute(exclusionPath,
-                                              (k, v) -> MutexState.admit(v, localNodeId)),
-                                              ConsistentMapException.ConcurrentModification.class,
-                                              Integer.MAX_VALUE,
-                                              100).get();
-    }
-
-    /**
-     * Releases lock for the specific path. This operation is idempotent.
-     * @param exclusionPath exclusion path
-     */
-    protected void unlock(String exclusionPath) {
-        Tools.retryable(() -> lockMap.asJavaMap()
-                                     .compute(exclusionPath, (k, v) -> MutexState.evict(v, localNodeId)),
-                        ConsistentMapException.ConcurrentModification.class,
-                        Integer.MAX_VALUE,
-                        100).get();
-    }
-
-    /**
-     * Detects and releases all locks held by this node.
-     */
-    private void releaseOldLocks() {
-        Maps.filterValues(lockMap.asJavaMap(), state -> localNodeId.equals(state.holder()))
-            .keySet()
-            .forEach(path -> {
-                log.info("Detected zombie task still holding lock for {}. Releasing lock.", path);
-                unlock(path);
-            });
-    }
-
-    private class InternalLockMapEventListener implements MapEventListener<String, MutexState> {
-
-        @Override
-        public void event(MapEvent<String, MutexState> event) {
-            log.debug("Received {}", event);
-            if (event.type() == MapEvent.Type.UPDATE || event.type() == MapEvent.Type.INSERT) {
-                pending.computeIfPresent(event.key(), (k, future) -> {
-                    MutexState state = Versioned.valueOrElse(event.value(), null);
-                    if (state != null && localNodeId.equals(state.holder())) {
-                        log.debug("Local node is now owner for {}", event.key());
-                        future.complete(state);
-                        return null;
-                    } else {
-                        return future;
-                    }
-                });
-                InnerMutexTask task = activeTasks.get(event.key());
-                if (task != null && task.term() < Versioned.valueOrElse(event.value(), null).term()) {
-                    task.stop();
-                }
-            }
-        }
-    }
-
-    private class InternalClusterEventListener implements ClusterEventListener {
-
-        @Override
-        public void event(ClusterEvent event) {
-            if (event.type() == ClusterEvent.Type.INSTANCE_DEACTIVATED ||
-                    event.type() == ClusterEvent.Type.INSTANCE_REMOVED) {
-                NodeId nodeId = event.subject().id();
-                log.debug("{} is no longer active. Attemping to clean up its locks.", nodeId);
-                lockMap.asJavaMap().forEach((k, v) -> {
-                    if (v.contains(nodeId)) {
-                        lockMap.compute(k, (path, state) -> MutexState.evict(v, nodeId));
-                    }
-                });
-            }
-            long activeNodes = clusterService.getNodes()
-                                             .stream()
-                                             .map(node -> clusterService.getState(node.id()))
-                                             .filter(State::isActive)
-                                             .count();
-            if (clusterService.getNodes().size() > 1 && activeNodes == 1) {
-                log.info("This node is partitioned away from the cluster. Stopping all inflight executions");
-                activeTasks.forEach((k, v) -> {
-                    v.stop();
-                });
-            }
-        }
-    }
-
-    private static final class MutexState {
-
-        private final NodeId holder;
-        private final List<NodeId> waitList;
-        private final long term;
-
-        public static MutexState admit(MutexState state, NodeId nodeId) {
-            if (state == null) {
-                return new MutexState(nodeId, 1L, Lists.newArrayList());
-            } else if (state.holder() == null) {
-                return new MutexState(nodeId, state.term() + 1, Lists.newArrayList());
-            } else {
-                if (!state.contains(nodeId)) {
-                    NodeId newHolder = state.holder();
-                    List<NodeId> newWaitList = Lists.newArrayList(state.waitList());
-                    newWaitList.add(nodeId);
-                    return new MutexState(newHolder, state.term(), newWaitList);
-                } else {
-                    return state;
-                }
-            }
-        }
-
-        public static MutexState evict(MutexState state, NodeId nodeId) {
-            return state.evict(nodeId);
-        }
-
-        public MutexState evict(NodeId nodeId) {
-            if (nodeId.equals(holder)) {
-                if (waitList.isEmpty()) {
-                    return new MutexState(null, term, waitList);
-                }
-                List<NodeId> newWaitList = Lists.newArrayList(waitList);
-                NodeId newHolder = newWaitList.remove(0);
-                return new MutexState(newHolder, term + 1, newWaitList);
-            } else {
-                NodeId newHolder = holder;
-                List<NodeId> newWaitList = Lists.newArrayList(waitList);
-                newWaitList.remove(nodeId);
-                return new MutexState(newHolder, term, newWaitList);
-            }
-        }
-
-        public NodeId holder() {
-            return holder;
-        }
-
-        public List<NodeId> waitList() {
-            return waitList;
-        }
-
-        public long term() {
-            return term;
-        }
-
-        private boolean contains(NodeId nodeId) {
-            return (nodeId.equals(holder) || waitList.contains(nodeId));
-        }
-
-        private MutexState(NodeId holder, long term, List<NodeId> waitList) {
-            this.holder = holder;
-            this.term = term;
-            this.waitList = Lists.newArrayList(waitList);
-        }
-
-        @Override
-        public String toString() {
-            return MoreObjects.toStringHelper(getClass())
-                    .add("holder", holder)
-                    .add("term", term)
-                    .add("waitList", waitList)
-                    .toString();
-        }
-    }
-
-    private class InnerMutexTask implements MutexTask {
-        private final MutexTask task;
-        private final String mutexPath;
-        private final long term;
-
-        public InnerMutexTask(String mutexPath, MutexTask task, long term) {
-            this.mutexPath = mutexPath;
-            this.term = term;
-            this.task = task;
-        }
-
-        public long term() {
-            return term;
-        }
-
-        @Override
-        public void start() {
-            log.debug("Starting execution for mutex task guarded by {}", mutexPath);
-            task.start();
-            log.debug("Finished execution for mutex task guarded by {}", mutexPath);
-        }
-
-        @Override
-        public void stop() {
-            log.debug("Stopping execution for mutex task guarded by {}", mutexPath);
-            task.stop();
-        }
-    }
-}
\ No newline at end of file
diff --git a/core/store/primitives/src/main/java/org/onosproject/store/primitives/impl/PartitionManager.java b/core/store/primitives/src/main/java/org/onosproject/store/primitives/impl/PartitionManager.java
index d4699a2..d2ea48c 100644
--- a/core/store/primitives/src/main/java/org/onosproject/store/primitives/impl/PartitionManager.java
+++ b/core/store/primitives/src/main/java/org/onosproject/store/primitives/impl/PartitionManager.java
@@ -94,7 +94,7 @@
                                messagingService,
                                clusterService,
                                CatalystSerializers.getSerializer(),
-                               new File(System.getProperty("karaf.data") + "/data/" + partition.getId()))));
+                               new File(System.getProperty("karaf.data") + "/partitions/" + partition.getId()))));
 
         CompletableFuture<Void> openFuture = CompletableFuture.allOf(partitions.values()
                                                                                .stream()
diff --git a/core/store/primitives/src/main/java/org/onosproject/store/primitives/impl/StorageManager.java b/core/store/primitives/src/main/java/org/onosproject/store/primitives/impl/StorageManager.java
index 5576b4f..ae07a0a 100644
--- a/core/store/primitives/src/main/java/org/onosproject/store/primitives/impl/StorageManager.java
+++ b/core/store/primitives/src/main/java/org/onosproject/store/primitives/impl/StorageManager.java
@@ -57,7 +57,6 @@
 import org.onosproject.store.service.TransactionContextBuilder;
 import org.slf4j.Logger;
 
-import com.google.common.collect.ImmutableMap;
 import com.google.common.collect.Maps;
 import com.google.common.util.concurrent.Futures;
 
@@ -129,7 +128,7 @@
     @Override
     public <K, V> ConsistentMapBuilder<K, V> consistentMapBuilder() {
         checkPermission(STORAGE_WRITE);
-        return new NewDefaultConsistentMapBuilder<>(federatedPrimitiveCreator);
+        return new DefaultConsistentMapBuilder<>(federatedPrimitiveCreator);
     }
 
     @Override
@@ -141,13 +140,13 @@
     @Override
     public <E> DistributedQueueBuilder<E> queueBuilder() {
         checkPermission(STORAGE_WRITE);
-        return new NewDefaultDistributedQueueBuilder<>(federatedPrimitiveCreator);
+        return new DefaultDistributedQueueBuilder<>(federatedPrimitiveCreator);
     }
 
     @Override
     public AtomicCounterBuilder atomicCounterBuilder() {
         checkPermission(STORAGE_WRITE);
-        return new NewDefaultAtomicCounterBuilder(federatedPrimitiveCreator);
+        return new DefaultAtomicCounterBuilder(federatedPrimitiveCreator);
     }
 
     @Override
@@ -163,7 +162,7 @@
     @Override
     public TransactionContextBuilder transactionContextBuilder() {
         checkPermission(STORAGE_WRITE);
-        return new NewDefaultTransactionContextBuilder(transactionIdGenerator.get(),
+        return new DefaultTransactionContextBuilder(transactionIdGenerator.get(),
                 federatedPrimitiveCreator,
                 transactionCoordinator);
     }
@@ -181,26 +180,10 @@
 
     @Override
     public Map<String, Long> getCounters() {
-        Map<String, Long> result = Maps.newHashMap();
-        result.putAll(getInMemoryDatabaseCounters());
-        result.putAll(getPartitionedDatabaseCounters());
-        return result;
-    }
-
-    @Override
-    public Map<String, Long> getInMemoryDatabaseCounters() {
-        return ImmutableMap.of();
-    }
-
-    @Override
-    public Map<String, Long> getPartitionedDatabaseCounters() {
-        return getCounters(federatedPrimitiveCreator);
-    }
-
-    public Map<String, Long> getCounters(DistributedPrimitiveCreator creator) {
         Map<String, Long> counters = Maps.newConcurrentMap();
-        creator.getAsyncAtomicCounterNames()
-               .forEach(name -> counters.put(name, creator.newAsyncCounter(name).asAtomicCounter().get()));
+        federatedPrimitiveCreator.getAsyncAtomicCounterNames()
+               .forEach(name -> counters.put(name,
+                       federatedPrimitiveCreator.newAsyncCounter(name).asAtomicCounter().get()));
         return counters;
     }
 
diff --git a/core/store/primitives/src/main/java/org/onosproject/store/primitives/impl/UnmodifiableAsyncConsistentMap.java b/core/store/primitives/src/main/java/org/onosproject/store/primitives/impl/UnmodifiableAsyncConsistentMap.java
index 30efc36..6525f12 100644
--- a/core/store/primitives/src/main/java/org/onosproject/store/primitives/impl/UnmodifiableAsyncConsistentMap.java
+++ b/core/store/primitives/src/main/java/org/onosproject/store/primitives/impl/UnmodifiableAsyncConsistentMap.java
@@ -35,6 +35,8 @@
  */
 public class UnmodifiableAsyncConsistentMap<K, V> extends DelegatingAsyncConsistentMap<K, V> {
 
+    private static final String ERROR_MSG = "map updates are not allowed";
+
     public UnmodifiableAsyncConsistentMap(AsyncConsistentMap<K, V> backingMap) {
         super(backingMap);
     }
@@ -43,56 +45,56 @@
     public CompletableFuture<Versioned<V>> computeIf(K key,
             Predicate<? super V> condition,
             BiFunction<? super K, ? super V, ? extends V> remappingFunction) {
-        return Tools.exceptionalFuture(new UnsupportedOperationException("map updates are not allowed"));
+        return Tools.exceptionalFuture(new UnsupportedOperationException(""));
     }
 
     @Override
     public CompletableFuture<Versioned<V>> put(K key, V value) {
-        return Tools.exceptionalFuture(new UnsupportedOperationException("map updates are not allowed"));
+        return Tools.exceptionalFuture(new UnsupportedOperationException(ERROR_MSG));
     }
 
     @Override
     public CompletableFuture<Versioned<V>> putAndGet(K key, V value) {
-        return Tools.exceptionalFuture(new UnsupportedOperationException("map updates are not allowed"));
+        return Tools.exceptionalFuture(new UnsupportedOperationException(ERROR_MSG));
     }
 
     @Override
     public CompletableFuture<Versioned<V>> remove(K key) {
-        return Tools.exceptionalFuture(new UnsupportedOperationException("map updates are not allowed"));
+        return Tools.exceptionalFuture(new UnsupportedOperationException(ERROR_MSG));
     }
 
     @Override
     public CompletableFuture<Void> clear() {
-        return Tools.exceptionalFuture(new UnsupportedOperationException("map updates are not allowed"));
+        return Tools.exceptionalFuture(new UnsupportedOperationException(ERROR_MSG));
     }
 
     @Override
     public CompletableFuture<Versioned<V>> putIfAbsent(K key, V value) {
-        return Tools.exceptionalFuture(new UnsupportedOperationException("map updates are not allowed"));
+        return Tools.exceptionalFuture(new UnsupportedOperationException(ERROR_MSG));
     }
 
     @Override
     public CompletableFuture<Boolean> remove(K key, V value) {
-        return Tools.exceptionalFuture(new UnsupportedOperationException("map updates are not allowed"));
+        return Tools.exceptionalFuture(new UnsupportedOperationException(ERROR_MSG));
     }
 
     @Override
     public CompletableFuture<Boolean> remove(K key, long version) {
-        return Tools.exceptionalFuture(new UnsupportedOperationException("map updates are not allowed"));
+        return Tools.exceptionalFuture(new UnsupportedOperationException(ERROR_MSG));
     }
 
     @Override
     public CompletableFuture<Versioned<V>> replace(K key, V value) {
-        return Tools.exceptionalFuture(new UnsupportedOperationException("map updates are not allowed"));
+        return Tools.exceptionalFuture(new UnsupportedOperationException(ERROR_MSG));
     }
 
     @Override
     public CompletableFuture<Boolean> replace(K key, V oldValue, V newValue) {
-        return Tools.exceptionalFuture(new UnsupportedOperationException("map updates are not allowed"));
+        return Tools.exceptionalFuture(new UnsupportedOperationException(ERROR_MSG));
     }
 
     @Override
     public CompletableFuture<Boolean> replace(K key, long oldVersion, V newValue) {
-        return Tools.exceptionalFuture(new UnsupportedOperationException("map updates are not allowed"));
+        return Tools.exceptionalFuture(new UnsupportedOperationException(ERROR_MSG));
     }
 }
diff --git a/core/store/primitives/src/main/java/org/onosproject/store/primitives/impl/package-info.java b/core/store/primitives/src/main/java/org/onosproject/store/primitives/impl/package-info.java
index cb20c3e..5b293c7 100644
--- a/core/store/primitives/src/main/java/org/onosproject/store/primitives/impl/package-info.java
+++ b/core/store/primitives/src/main/java/org/onosproject/store/primitives/impl/package-info.java
@@ -15,7 +15,6 @@
  */
 
 /**
- * Implementation of partitioned and distributed store facility capable of
- * providing consistent update semantics.
+ * Implementation classes for various Distributed primitives.
  */
 package org.onosproject.store.primitives.impl;
\ No newline at end of file