diff --git a/src/main/java/envoy/server/data/GroupMessage.java b/src/main/java/envoy/server/data/GroupMessage.java
index bc9fed7..4c64cf7 100644
--- a/src/main/java/envoy/server/data/GroupMessage.java
+++ b/src/main/java/envoy/server/data/GroupMessage.java
@@ -18,7 +18,6 @@ import envoy.data.MessageBuilder;
  * @author Maximilian Käfer
  * @since Envoy Server Standalone v0.1-beta
  */
-
 @Entity
 public class GroupMessage extends Message {
 
diff --git a/src/main/java/envoy/server/data/Message.java b/src/main/java/envoy/server/data/Message.java
index 128b122..9203a4f 100755
--- a/src/main/java/envoy/server/data/Message.java
+++ b/src/main/java/envoy/server/data/Message.java
@@ -2,16 +2,7 @@ package envoy.server.data;
 
 import java.util.Date;
 
-import javax.persistence.Entity;
-import javax.persistence.Id;
-import javax.persistence.Inheritance;
-import javax.persistence.InheritanceType;
-import javax.persistence.JoinColumn;
-import javax.persistence.ManyToOne;
-import javax.persistence.NamedQuery;
-import javax.persistence.Table;
-import javax.persistence.Temporal;
-import javax.persistence.TemporalType;
+import javax.persistence.*;
 
 import envoy.data.MessageBuilder;
 
diff --git a/src/main/java/envoy/server/net/ConnectionManager.java b/src/main/java/envoy/server/net/ConnectionManager.java
index ef384bb..03f3810 100755
--- a/src/main/java/envoy/server/net/ConnectionManager.java
+++ b/src/main/java/envoy/server/net/ConnectionManager.java
@@ -1,6 +1,10 @@
 package envoy.server.net;
 
-import java.util.*;
+import java.util.Date;
+import java.util.HashMap;
+import java.util.HashSet;
+import java.util.Map;
+import java.util.Set;
 import java.util.stream.Collectors;
 
 import com.jenkov.nioserver.ISocketIdListener;
@@ -111,9 +115,6 @@ public class ConnectionManager implements ISocketIdListener {
 	 * @since Envoy Server Standalone v0.1-beta
 	 */
 	public Set<Long> getOnlineUsersOfGroup(Group group) {
-		Set<Long>	onlineMembers	= new HashSet<>();
-		Set<Long>	members			= group.getContacts().stream().map(envoy.server.data.Contact::getID).collect(Collectors.toSet());
-		members.forEach(userID -> { if (isOnline(userID)) onlineMembers.add(userID); });
-		return onlineMembers;
+		return group.getContacts().stream().map(envoy.server.data.Contact::getID).filter(this::isOnline).collect(Collectors.toSet());
 	}
 }
diff --git a/src/main/java/envoy/server/processors/GroupMessageProcessor.java b/src/main/java/envoy/server/processors/GroupMessageProcessor.java
index 790f4e3..087e2c0 100644
--- a/src/main/java/envoy/server/processors/GroupMessageProcessor.java
+++ b/src/main/java/envoy/server/processors/GroupMessageProcessor.java
@@ -8,7 +8,6 @@ import javax.persistence.EntityExistsException;
 
 import envoy.data.GroupMessage;
 import envoy.data.Message.MessageStatus;
-import envoy.event.MessageStatusChangeEvent;
 import envoy.server.data.PersistenceManager;
 import envoy.server.net.ConnectionManager;
 import envoy.server.net.ObjectWriteProxy;
@@ -30,12 +29,6 @@ public class GroupMessageProcessor implements ObjectProcessor<GroupMessage> {
 	public void process(GroupMessage groupMessage, long socketID, ObjectWriteProxy writeProxy) {
 		groupMessage.nextStatus();
 		ConnectionManager connectionManager = ConnectionManager.getInstance();
-		try {
-			writeProxy.write(socketID, new MessageStatusChangeEvent(groupMessage));
-		} catch (IOException e) {
-			logger.warning("Could not send messageStatusChangeEvent to the sender of this groupMessage with ID: " + groupMessage.getID());
-			e.printStackTrace();
-		}
 
 		final var members = PersistenceManager.getInstance().getGroupByID(groupMessage.getRecipientID()).getContacts();
 		for (long i = 0; i < groupMessage.getMemberStatuses().size(); i++) {
diff --git a/src/main/java/envoy/server/processors/GroupResizeProcessor.java b/src/main/java/envoy/server/processors/GroupResizeProcessor.java
index 7bcc72a..dc99535 100644
--- a/src/main/java/envoy/server/processors/GroupResizeProcessor.java
+++ b/src/main/java/envoy/server/processors/GroupResizeProcessor.java
@@ -49,7 +49,7 @@ public class GroupResizeProcessor implements ObjectProcessor<GroupResizeEvent> {
 			.map(connectionManager::getSocketId)
 			.forEach(memberSocketID -> {
 				try {
-						writeProxy.write(memberSocketID, commonGroup);
+					writeProxy.write(memberSocketID, commonGroup);
 				} catch (IOException e) {
 					e.printStackTrace();
 				}