diff --git a/src/main/java/envoy/data/Group.java b/src/main/java/envoy/data/Group.java
index bec17be..4eb6b02 100644
--- a/src/main/java/envoy/data/Group.java
+++ b/src/main/java/envoy/data/Group.java
@@ -47,7 +47,6 @@ public final class Group extends Contact {
 		outputStream.defaultWriteObject();
 		getContacts().forEach(user -> user.serializeContacts(false));
 		outputStream.writeObject(getContacts());
-
 	}
 
 	@SuppressWarnings("unchecked")
diff --git a/src/main/java/envoy/data/GroupMessage.java b/src/main/java/envoy/data/GroupMessage.java
index 234c354..a2f8488 100644
--- a/src/main/java/envoy/data/GroupMessage.java
+++ b/src/main/java/envoy/data/GroupMessage.java
@@ -55,7 +55,6 @@ public final class GroupMessage extends Message {
 			case RECEIVED:
 				setReceivedDate(new Date());
 				break;
-
 			case READ:
 				setReadDate(new Date());
 				break;
diff --git a/src/main/java/envoy/data/User.java b/src/main/java/envoy/data/User.java
index 01b2439..7751ce3 100644
--- a/src/main/java/envoy/data/User.java
+++ b/src/main/java/envoy/data/User.java
@@ -21,7 +21,7 @@ public final class User extends Contact {
 	private UserStatus status;
 
 	/**
-	 * Used to serialize contact list to a maximum depth of one
+	 * Used to serialize contact list to a maximum depth of one.
 	 */
 	private transient boolean serializeContacts = true;
 
diff --git a/src/main/java/envoy/event/ElementOperation.java b/src/main/java/envoy/event/ElementOperation.java
index e0ed0df..b7d4c10 100644
--- a/src/main/java/envoy/event/ElementOperation.java
+++ b/src/main/java/envoy/event/ElementOperation.java
@@ -13,14 +13,16 @@ package envoy.event;
  * @since Envoy Common v0.1-beta
  */
 public enum ElementOperation {
+
 	/**
 	 * Select this element, if the given element should be added to the given
-	 * container
+	 * container.
 	 */
 	ADD,
+
 	/**
 	 * Select this element, if the given element should be removed from the given
-	 * container
+	 * container.
 	 */
 	REMOVE
 }
diff --git a/src/main/java/envoy/event/GroupResizeEvent.java b/src/main/java/envoy/event/GroupResizeEvent.java
index a0d8d40..46952d5 100644
--- a/src/main/java/envoy/event/GroupResizeEvent.java
+++ b/src/main/java/envoy/event/GroupResizeEvent.java
@@ -8,7 +8,7 @@ import envoy.data.User;
  * This event is used to communicate changes in the group size between client
  * and server.<br>
  * Possible actions are adding or removing certain {@link User}s to or from a
- * certain {@link Group}
+ * certain {@link Group}.
  * <br>
  * Project: <strong>envoy-common</strong><br>
  * File: <strong>GroupResizeEvent.java</strong><br>