Fixs some misspellings

Change-Id: I03d23d8acca8789b430f74fdac80d287f0fa59df
diff --git a/core/api/src/main/java/org/onosproject/net/statistic/StatisticService.java b/core/api/src/main/java/org/onosproject/net/statistic/StatisticService.java
index d8162ec..1bf30ca 100644
--- a/core/api/src/main/java/org/onosproject/net/statistic/StatisticService.java
+++ b/core/api/src/main/java/org/onosproject/net/statistic/StatisticService.java
@@ -27,7 +27,7 @@
 /**
  * Service for obtaining statistic information about link in the system.
  * Statistics are obtained from the FlowRuleService in order to minimize the
- * amount of hammering occuring at the dataplane.
+ * amount of hammering occurring at the dataplane.
  */
 public interface StatisticService {
 
diff --git a/core/api/src/test/java/org/onosproject/store/service/TestDocumentTreeNode.java b/core/api/src/test/java/org/onosproject/store/service/TestDocumentTreeNode.java
index 508fad2..665355f 100644
--- a/core/api/src/test/java/org/onosproject/store/service/TestDocumentTreeNode.java
+++ b/core/api/src/test/java/org/onosproject/store/service/TestDocumentTreeNode.java
@@ -76,7 +76,7 @@
      * @param newValue new value to set
      * @param newVersion new version to set
      * @return previous value; can be {@code null} if no child currently exists with that relative path name.
-     * a non null return value indicates child already exists and no modification occured.
+     * a non null return value indicates child already exists and no modification occurred.
      */
     public Versioned<V> addChild(String name, V newValue, long newVersion) {
         TestDocumentTreeNode<V> child = (TestDocumentTreeNode<V>) children.get(name);
diff --git a/core/common/src/test/java/org/onosproject/store/trivial/SimpleLinkStore.java b/core/common/src/test/java/org/onosproject/store/trivial/SimpleLinkStore.java
index 44fd120..0241b41 100644
--- a/core/common/src/test/java/org/onosproject/store/trivial/SimpleLinkStore.java
+++ b/core/common/src/test/java/org/onosproject/store/trivial/SimpleLinkStore.java
@@ -251,7 +251,7 @@
                 !AnnotationsUtil.isEqual(oldLink.annotations(), newLink.annotations())) {
 
             links.put(key, newLink);
-            // strictly speaking following can be ommitted
+            // strictly speaking following can be omitted
             srcLinks.put(oldLink.src().deviceId(), key);
             dstLinks.put(oldLink.dst().deviceId(), key);
             return new LinkEvent(LINK_UPDATED, newLink);
diff --git a/core/store/dist/src/main/java/org/onosproject/store/resource/impl/MapNames.java b/core/store/dist/src/main/java/org/onosproject/store/resource/impl/MapNames.java
index 18b6bb3..a1e5a98 100644
--- a/core/store/dist/src/main/java/org/onosproject/store/resource/impl/MapNames.java
+++ b/core/store/dist/src/main/java/org/onosproject/store/resource/impl/MapNames.java
@@ -21,6 +21,6 @@
     static final String CONTINUOUS_CONSUMER_MAP = "onos-continuous-consumers";
     static final String CONTINUOUS_CHILD_MAP = "onos-resource-continuous-children";
 
-    // prohibit contruction
+    // prohibit construction
     private MapNames() {}
 }
diff --git a/core/store/primitives/src/main/java/org/onosproject/store/primitives/resources/impl/DefaultDocumentTreeNode.java b/core/store/primitives/src/main/java/org/onosproject/store/primitives/resources/impl/DefaultDocumentTreeNode.java
index 5623185..0f5d66a 100644
--- a/core/store/primitives/src/main/java/org/onosproject/store/primitives/resources/impl/DefaultDocumentTreeNode.java
+++ b/core/store/primitives/src/main/java/org/onosproject/store/primitives/resources/impl/DefaultDocumentTreeNode.java
@@ -94,7 +94,7 @@
      * @param newValue new value to set
      * @param newVersion new version to set
      * @return previous value; can be {@code null} if no child currently exists with that relative path name.
-     * a non null return value indicates child already exists and no modification occured.
+     * a non null return value indicates child already exists and no modification occurred.
      */
     public Versioned<V> addChild(String name, V newValue, long newVersion) {
         DefaultDocumentTreeNode<V> child = (DefaultDocumentTreeNode<V>) children.get(name);