diff --git a/connectivity/service/src/main/java/org/eclipse/ditto/connectivity/service/ConnectivityRootActor.java b/connectivity/service/src/main/java/org/eclipse/ditto/connectivity/service/ConnectivityRootActor.java
index f543f288ff..f80e5f547a 100644
--- a/connectivity/service/src/main/java/org/eclipse/ditto/connectivity/service/ConnectivityRootActor.java
+++ b/connectivity/service/src/main/java/org/eclipse/ditto/connectivity/service/ConnectivityRootActor.java
@@ -75,6 +75,7 @@ private ConnectivityRootActor(final ConnectivityConfig connectivityConfig,
 
         final ClusterConfig clusterConfig = connectivityConfig.getClusterConfig();
         final ActorSystem actorSystem = getContext().system();
+        final Config config = actorSystem.settings().config();
 
         final ActorRef commandForwarder = getCommandForwarder(clusterConfig, pubSubMediator);
 
@@ -101,7 +102,6 @@ private ConnectivityRootActor(final ConnectivityConfig connectivityConfig,
                         startConnectionShardRegion(actorSystem, connectionSupervisorProps, clusterConfig),
                         connectivityConfig.getPingConfig(), mongoReadJournal),
                 PersistencePingActor.ACTOR_NAME);
-        final Config config = actorSystem.settings().config();
         final ConnectionIdsRetrievalConfig connectionIdsRetrievalConfig =
                 connectivityConfig.getConnectionIdsRetrievalConfig();
         final ActorRef connectionIdsRetrievalActor = startChildActor(
diff --git a/connectivity/service/src/main/java/org/eclipse/ditto/connectivity/service/mapping/ConnectivitySignalEnrichmentProvider.java b/connectivity/service/src/main/java/org/eclipse/ditto/connectivity/service/mapping/ConnectivitySignalEnrichmentProvider.java
index fc80c00d86..27ce3938b9 100644
--- a/connectivity/service/src/main/java/org/eclipse/ditto/connectivity/service/mapping/ConnectivitySignalEnrichmentProvider.java
+++ b/connectivity/service/src/main/java/org/eclipse/ditto/connectivity/service/mapping/ConnectivitySignalEnrichmentProvider.java
@@ -46,6 +46,7 @@ public interface ConnectivitySignalEnrichmentProvider extends DittoExtensionPoin
      * Load a {@code ConnectivitySignalEnrichmentProvider} dynamically according to the streaming configuration.
      *
      * @param actorSystem The actor system in which to load the facade provider class.
+     * @param config the config the extension is configured.
      * @return The configured facade provider.
      */
     static ConnectivitySignalEnrichmentProvider get(final ActorSystem actorSystem, final Config config) {
diff --git a/connectivity/service/src/main/java/org/eclipse/ditto/connectivity/service/messaging/persistence/UsageBasedPriorityProviderFactory.java b/connectivity/service/src/main/java/org/eclipse/ditto/connectivity/service/messaging/persistence/UsageBasedPriorityProviderFactory.java
index b3d45cb84a..7e55b81959 100644
--- a/connectivity/service/src/main/java/org/eclipse/ditto/connectivity/service/messaging/persistence/UsageBasedPriorityProviderFactory.java
+++ b/connectivity/service/src/main/java/org/eclipse/ditto/connectivity/service/messaging/persistence/UsageBasedPriorityProviderFactory.java
@@ -23,6 +23,7 @@ public class UsageBasedPriorityProviderFactory implements ConnectionPriorityProv
 
     /**
      * @param actorSystem the actor system in which to load the extension.
+     * @param config the config the extension is configured.
      */
     protected UsageBasedPriorityProviderFactory(final ActorSystem actorSystem, final Config config) {
     }
diff --git a/connectivity/service/src/main/java/org/eclipse/ditto/connectivity/service/messaging/validation/NoOpConnectivityCommandInterceptorProvider.java b/connectivity/service/src/main/java/org/eclipse/ditto/connectivity/service/messaging/validation/NoOpConnectivityCommandInterceptorProvider.java
index dd7f847ea8..44b80ec7b7 100644
--- a/connectivity/service/src/main/java/org/eclipse/ditto/connectivity/service/messaging/validation/NoOpConnectivityCommandInterceptorProvider.java
+++ b/connectivity/service/src/main/java/org/eclipse/ditto/connectivity/service/messaging/validation/NoOpConnectivityCommandInterceptorProvider.java
@@ -26,6 +26,7 @@ public class NoOpConnectivityCommandInterceptorProvider implements CustomConnect
 
     /**
      * @param actorSystem the actor system in which to load the extension.
+     * @param config the config the extension is configured.
      */
     protected NoOpConnectivityCommandInterceptorProvider(final ActorSystem actorSystem, final Config config) {
     }
diff --git a/connectivity/service/src/test/java/org/eclipse/ditto/connectivity/service/messaging/ExceptionClientActorPropsFactory.java b/connectivity/service/src/test/java/org/eclipse/ditto/connectivity/service/messaging/ExceptionClientActorPropsFactory.java
index 87a6e506e7..34052e4193 100644
--- a/connectivity/service/src/test/java/org/eclipse/ditto/connectivity/service/messaging/ExceptionClientActorPropsFactory.java
+++ b/connectivity/service/src/test/java/org/eclipse/ditto/connectivity/service/messaging/ExceptionClientActorPropsFactory.java
@@ -22,11 +22,14 @@
 import akka.actor.ActorSystem;
 import akka.actor.Props;
 
-public class ExceptionClientActorPropsFactory implements ClientActorPropsFactory{
+@SuppressWarnings("unused")
+public class ExceptionClientActorPropsFactory implements ClientActorPropsFactory {
 
     /**
      * @param actorSystem the actor system in which to load the extension.
+     * @param config the config the extension is configured.
      */
+    @SuppressWarnings("unused")
     protected ExceptionClientActorPropsFactory(final ActorSystem actorSystem, final Config config) {
 
     }
diff --git a/connectivity/service/src/test/java/org/eclipse/ditto/connectivity/service/messaging/ExceptionalCommandValidator.java b/connectivity/service/src/test/java/org/eclipse/ditto/connectivity/service/messaging/ExceptionalCommandValidator.java
index 25e893be02..6f54e9b5ce 100644
--- a/connectivity/service/src/test/java/org/eclipse/ditto/connectivity/service/messaging/ExceptionalCommandValidator.java
+++ b/connectivity/service/src/test/java/org/eclipse/ditto/connectivity/service/messaging/ExceptionalCommandValidator.java
@@ -28,6 +28,7 @@ public class ExceptionalCommandValidator implements CustomConnectivityCommandInt
 
     /**
      * @param actorSystem the actor system in which to load the extension.
+     * @param config the config the extension is configured.
      */
     protected ExceptionalCommandValidator(final ActorSystem actorSystem, final Config config) {
     }
diff --git a/connectivity/service/src/test/java/org/eclipse/ditto/connectivity/service/messaging/FaultyClientActorPropsFactory.java b/connectivity/service/src/test/java/org/eclipse/ditto/connectivity/service/messaging/FaultyClientActorPropsFactory.java
index d677c14c89..9b13fb1f96 100644
--- a/connectivity/service/src/test/java/org/eclipse/ditto/connectivity/service/messaging/FaultyClientActorPropsFactory.java
+++ b/connectivity/service/src/test/java/org/eclipse/ditto/connectivity/service/messaging/FaultyClientActorPropsFactory.java
@@ -21,6 +21,7 @@
 import akka.actor.ActorSystem;
 import akka.actor.Props;
 
+@SuppressWarnings("unused")
 public final class FaultyClientActorPropsFactory implements ClientActorPropsFactory {
 
     private final boolean allowFirstCreateCommand;
@@ -28,8 +29,10 @@ public final class FaultyClientActorPropsFactory implements ClientActorPropsFact
 
     /**
      * @param actorSystem the actor system in which to load the extension.
+     * @param config the config the extension is configured.
      */
-    protected FaultyClientActorPropsFactory(final ActorSystem actorSystem, final Config config) {
+    @SuppressWarnings("unused")
+    private FaultyClientActorPropsFactory(final ActorSystem actorSystem, final Config config) {
         allowFirstCreateCommand = actorSystem.settings().config().getBoolean("allowFirstCreateCommand");
         allowCloseCommands = actorSystem.settings().config().getBoolean("allowCloseCommands");
     }
diff --git a/connectivity/service/src/test/java/org/eclipse/ditto/connectivity/service/messaging/MockClientActorPropsFactory.java b/connectivity/service/src/test/java/org/eclipse/ditto/connectivity/service/messaging/MockClientActorPropsFactory.java
index 1ce8cb50da..0bbcc55ba8 100644
--- a/connectivity/service/src/test/java/org/eclipse/ditto/connectivity/service/messaging/MockClientActorPropsFactory.java
+++ b/connectivity/service/src/test/java/org/eclipse/ditto/connectivity/service/messaging/MockClientActorPropsFactory.java
@@ -48,10 +48,12 @@
 import akka.cluster.pubsub.DistributedPubSubMediator;
 import akka.event.DiagnosticLoggingAdapter;
 
+@SuppressWarnings("unused")
 public final class MockClientActorPropsFactory implements ClientActorPropsFactory {
 
     /**
      * @param actorSystem the actor system in which to load the extension.
+     * @param config the config the extension is configured.
      */
     public MockClientActorPropsFactory(final ActorSystem actorSystem, final Config config) {
     }
diff --git a/connectivity/service/src/test/java/org/eclipse/ditto/connectivity/service/messaging/SearchForwardingClientActorPropsFactory.java b/connectivity/service/src/test/java/org/eclipse/ditto/connectivity/service/messaging/SearchForwardingClientActorPropsFactory.java
index 44fce7e271..c02cd6f463 100644
--- a/connectivity/service/src/test/java/org/eclipse/ditto/connectivity/service/messaging/SearchForwardingClientActorPropsFactory.java
+++ b/connectivity/service/src/test/java/org/eclipse/ditto/connectivity/service/messaging/SearchForwardingClientActorPropsFactory.java
@@ -32,11 +32,14 @@
 import akka.event.DiagnosticLoggingAdapter;
 import akka.japi.pf.ReceiveBuilder;
 
+@SuppressWarnings("unused")
 public final class SearchForwardingClientActorPropsFactory implements ClientActorPropsFactory {
 
     /**
      * @param actorSystem the actor system in which to load the extension.
+     * @param config the config the extension is configured.
      */
+    @SuppressWarnings("unused")
     public SearchForwardingClientActorPropsFactory(final ActorSystem actorSystem, final Config config) {
     }
 
diff --git a/edge/service/src/main/java/org/eclipse/ditto/edge/service/dispatching/EdgeCommandForwarderExtension.java b/edge/service/src/main/java/org/eclipse/ditto/edge/service/dispatching/EdgeCommandForwarderExtension.java
index aac1d81d61..5c76555abd 100644
--- a/edge/service/src/main/java/org/eclipse/ditto/edge/service/dispatching/EdgeCommandForwarderExtension.java
+++ b/edge/service/src/main/java/org/eclipse/ditto/edge/service/dispatching/EdgeCommandForwarderExtension.java
@@ -30,12 +30,12 @@
 public interface EdgeCommandForwarderExtension extends DittoExtensionPoint {
 
     /**
-     * Loads the implementation of {@code RootChildActorStarter} which is configured for the
+     * Loads the implementation of {@code EdgeCommandForwarderExtension} which is configured for the
      * {@code ActorSystem}.
      *
-     * @param actorSystem the actorSystem in which the {@code RootChildActorStarter} should be loaded.
+     * @param actorSystem the actorSystem in which the {@code EdgeCommandForwarderExtension} should be loaded.
      * @param config the configuration for this extension.
-     * @return the {@code RootChildActorStarter} implementation.
+     * @return the {@code EdgeCommandForwarderExtension} implementation.
      * @throws NullPointerException if {@code actorSystem} is {@code null}.
      */
     static EdgeCommandForwarderExtension get(final ActorSystem actorSystem, final Config config) {
diff --git a/edge/service/src/main/java/org/eclipse/ditto/edge/service/dispatching/NoOpEdgeCommandForwarderExtension.java b/edge/service/src/main/java/org/eclipse/ditto/edge/service/dispatching/NoOpEdgeCommandForwarderExtension.java
index ce7c793158..593c759f4b 100644
--- a/edge/service/src/main/java/org/eclipse/ditto/edge/service/dispatching/NoOpEdgeCommandForwarderExtension.java
+++ b/edge/service/src/main/java/org/eclipse/ditto/edge/service/dispatching/NoOpEdgeCommandForwarderExtension.java
@@ -31,7 +31,9 @@ public final class NoOpEdgeCommandForwarderExtension implements EdgeCommandForwa
      * Constructs a new instance of NoOpEdgeCommandForwarderExtension.
      *
      * @param actorSystem the actor system in which to load the extension.
+     * @param config the config the extension is configured.
      */
+    @SuppressWarnings("unused")
     public NoOpEdgeCommandForwarderExtension(final ActorSystem actorSystem, final Config config) {
         // no-op
     }
diff --git a/edge/service/src/main/java/org/eclipse/ditto/edge/service/dispatching/signaltransformer/DefaultNamespaceAppender.java b/edge/service/src/main/java/org/eclipse/ditto/edge/service/dispatching/signaltransformer/DefaultNamespaceAppender.java
index 4f0a534a29..b336e78b34 100644
--- a/edge/service/src/main/java/org/eclipse/ditto/edge/service/dispatching/signaltransformer/DefaultNamespaceAppender.java
+++ b/edge/service/src/main/java/org/eclipse/ditto/edge/service/dispatching/signaltransformer/DefaultNamespaceAppender.java
@@ -50,7 +50,9 @@ public final class DefaultNamespaceAppender implements SignalTransformer {
      * Constructs a new instance of DefaultNamespaceAppender extension.
      *
      * @param actorSystem the actor system in which to load the extension.
+     * @param config the config the extension is configured.
      */
+    @SuppressWarnings("unused")
     public DefaultNamespaceAppender(final ActorSystem actorSystem, final Config config) {
         defaultNamespace = config.hasPath(DEFAULT_NAMESPACE_CONFIG_KEY) ?
                 config.getString(DEFAULT_NAMESPACE_CONFIG_KEY) :
diff --git a/edge/service/src/main/java/org/eclipse/ditto/edge/service/dispatching/signaltransformer/OriginatorSetterSignalTransformer.java b/edge/service/src/main/java/org/eclipse/ditto/edge/service/dispatching/signaltransformer/OriginatorSetterSignalTransformer.java
index 5bdb7ab47e..9d04cfc14f 100644
--- a/edge/service/src/main/java/org/eclipse/ditto/edge/service/dispatching/signaltransformer/OriginatorSetterSignalTransformer.java
+++ b/edge/service/src/main/java/org/eclipse/ditto/edge/service/dispatching/signaltransformer/OriginatorSetterSignalTransformer.java
@@ -39,6 +39,7 @@ public final class OriginatorSetterSignalTransformer implements SignalTransforme
      * Constructs a new instance of HeaderSetterPreEnforcer extension.
      *
      * @param actorSystem the actor system in which to load the extension.
+     * @param config the configuration for this extension.
      */
     @SuppressWarnings("unused")
     public OriginatorSetterSignalTransformer(final ActorSystem actorSystem, final Config config) {
diff --git a/gateway/service/src/main/java/org/eclipse/ditto/gateway/service/endpoints/routes/LoggingHttpBindFlowProvider.java b/gateway/service/src/main/java/org/eclipse/ditto/gateway/service/endpoints/routes/LoggingHttpBindFlowProvider.java
index 1561217927..523a40169a 100644
--- a/gateway/service/src/main/java/org/eclipse/ditto/gateway/service/endpoints/routes/LoggingHttpBindFlowProvider.java
+++ b/gateway/service/src/main/java/org/eclipse/ditto/gateway/service/endpoints/routes/LoggingHttpBindFlowProvider.java
@@ -34,7 +34,9 @@ public final class LoggingHttpBindFlowProvider implements HttpBindFlowProvider {
 
     /**
      * @param actorSystem the actor system in which to load the extension.
+     * @param config the config the extension is configured.
      */
+    @SuppressWarnings("unused")
     public LoggingHttpBindFlowProvider(final ActorSystem actorSystem, final Config config) {
         this.actorSystem = actorSystem;
     }
diff --git a/gateway/service/src/main/java/org/eclipse/ditto/gateway/service/endpoints/routes/sse/NoOpSseConnectionSupervisor.java b/gateway/service/src/main/java/org/eclipse/ditto/gateway/service/endpoints/routes/sse/NoOpSseConnectionSupervisor.java
index 3611080fe5..23e02d6ed6 100644
--- a/gateway/service/src/main/java/org/eclipse/ditto/gateway/service/endpoints/routes/sse/NoOpSseConnectionSupervisor.java
+++ b/gateway/service/src/main/java/org/eclipse/ditto/gateway/service/endpoints/routes/sse/NoOpSseConnectionSupervisor.java
@@ -26,7 +26,9 @@ public final class NoOpSseConnectionSupervisor implements SseConnectionSuperviso
 
     /**
      * @param actorSystem the actor system in which to load the extension.
+     * @param config the config the extension is configured.
      */
+    @SuppressWarnings("unused")
     public NoOpSseConnectionSupervisor(final ActorSystem actorSystem, final Config config) {
         //No-Op because extensions need a constructor accepting an actorSystem
     }
diff --git a/gateway/service/src/main/java/org/eclipse/ditto/gateway/service/endpoints/routes/sse/NoOpSseEventSniffer.java b/gateway/service/src/main/java/org/eclipse/ditto/gateway/service/endpoints/routes/sse/NoOpSseEventSniffer.java
index 108dfe6a82..d626f3d387 100644
--- a/gateway/service/src/main/java/org/eclipse/ditto/gateway/service/endpoints/routes/sse/NoOpSseEventSniffer.java
+++ b/gateway/service/src/main/java/org/eclipse/ditto/gateway/service/endpoints/routes/sse/NoOpSseEventSniffer.java
@@ -25,6 +25,7 @@
  */
 public final class NoOpSseEventSniffer implements SseEventSniffer {
 
+    @SuppressWarnings("unused")
     public NoOpSseEventSniffer(final ActorSystem actorSystem, final Config config) {
         //No-Op because extensions need a constructor accepting an actorSystem
     }
diff --git a/gateway/service/src/main/java/org/eclipse/ditto/gateway/service/endpoints/routes/sse/SseConnectionSupervisor.java b/gateway/service/src/main/java/org/eclipse/ditto/gateway/service/endpoints/routes/sse/SseConnectionSupervisor.java
index 06d5bbe60c..ff203b126d 100644
--- a/gateway/service/src/main/java/org/eclipse/ditto/gateway/service/endpoints/routes/sse/SseConnectionSupervisor.java
+++ b/gateway/service/src/main/java/org/eclipse/ditto/gateway/service/endpoints/routes/sse/SseConnectionSupervisor.java
@@ -32,6 +32,7 @@ public interface SseConnectionSupervisor extends DittoExtensionPoint, StreamSupe
      * {@code ActorSystem}.
      *
      * @param actorSystem the actorSystem in which the {@code SseConnectionSupervisor} should be loaded.
+     * @param config the config the extension is configured.
      * @return the {@code SseConnectionSupervisor} implementation.
      * @throws NullPointerException if {@code actorSystem} is {@code null}.
      * @since 3.0.0
diff --git a/gateway/service/src/main/java/org/eclipse/ditto/gateway/service/endpoints/routes/sse/SseEventSniffer.java b/gateway/service/src/main/java/org/eclipse/ditto/gateway/service/endpoints/routes/sse/SseEventSniffer.java
index 71f1f7c6f3..76527d3b16 100644
--- a/gateway/service/src/main/java/org/eclipse/ditto/gateway/service/endpoints/routes/sse/SseEventSniffer.java
+++ b/gateway/service/src/main/java/org/eclipse/ditto/gateway/service/endpoints/routes/sse/SseEventSniffer.java
@@ -43,6 +43,7 @@ public interface SseEventSniffer extends DittoExtensionPoint {
      * {@code ActorSystem}.
      *
      * @param actorSystem the actorSystem in which the {@code SseEventSniffer} should be loaded.
+     * @param config the config the extension is configured.
      * @return the {@code SseEventSniffer} implementation.
      * @throws NullPointerException if {@code actorSystem} is {@code null}.
      * @since 3.0.0
diff --git a/gateway/service/src/main/java/org/eclipse/ditto/gateway/service/endpoints/routes/websocket/NoOpWebSocketConfigProvider.java b/gateway/service/src/main/java/org/eclipse/ditto/gateway/service/endpoints/routes/websocket/NoOpWebSocketConfigProvider.java
index 488e924109..c188063613 100644
--- a/gateway/service/src/main/java/org/eclipse/ditto/gateway/service/endpoints/routes/websocket/NoOpWebSocketConfigProvider.java
+++ b/gateway/service/src/main/java/org/eclipse/ditto/gateway/service/endpoints/routes/websocket/NoOpWebSocketConfigProvider.java
@@ -26,6 +26,7 @@ public final class NoOpWebSocketConfigProvider implements WebSocketConfigProvide
 
     /**
      * @param actorSystem the actor system in which to load the extension.
+     * @param config the config the extension is configured.
      */
     @SuppressWarnings("unused")
     public NoOpWebSocketConfigProvider(final ActorSystem actorSystem, final Config config) {
diff --git a/gateway/service/src/main/java/org/eclipse/ditto/gateway/service/endpoints/routes/websocket/NoOpWebSocketSupervisor.java b/gateway/service/src/main/java/org/eclipse/ditto/gateway/service/endpoints/routes/websocket/NoOpWebSocketSupervisor.java
index 6ac00849d5..3d6dc2d39a 100644
--- a/gateway/service/src/main/java/org/eclipse/ditto/gateway/service/endpoints/routes/websocket/NoOpWebSocketSupervisor.java
+++ b/gateway/service/src/main/java/org/eclipse/ditto/gateway/service/endpoints/routes/websocket/NoOpWebSocketSupervisor.java
@@ -26,7 +26,9 @@ public final class NoOpWebSocketSupervisor implements WebSocketSupervisor {
 
     /**
      * @param actorSystem the actor system in which to load the extension.
+     * @param config the config the extension is configured.
      */
+    @SuppressWarnings("unused")
     public NoOpWebSocketSupervisor(final ActorSystem actorSystem, final Config config) {
         //No-Op because extensions need a constructor accepting an actorSystem
     }
diff --git a/gateway/service/src/main/java/org/eclipse/ditto/gateway/service/endpoints/routes/websocket/WebSocketSupervisor.java b/gateway/service/src/main/java/org/eclipse/ditto/gateway/service/endpoints/routes/websocket/WebSocketSupervisor.java
index ed46bf76f8..bce531026b 100644
--- a/gateway/service/src/main/java/org/eclipse/ditto/gateway/service/endpoints/routes/websocket/WebSocketSupervisor.java
+++ b/gateway/service/src/main/java/org/eclipse/ditto/gateway/service/endpoints/routes/websocket/WebSocketSupervisor.java
@@ -32,6 +32,7 @@ public interface WebSocketSupervisor extends DittoExtensionPoint, StreamSupervis
      * {@code ActorSystem}.
      *
      * @param actorSystem the actorSystem in which the {@code WebSocketSupervisor} should be loaded.
+     * @param config the config the extension is configured.
      * @return the {@code WebSocketSupervisor} implementation.
      * @throws NullPointerException if {@code actorSystem} is {@code null}.
      * @since 3.0.0
diff --git a/gateway/service/src/main/java/org/eclipse/ditto/gateway/service/endpoints/utils/DefaultGatewaySignalEnrichmentProvider.java b/gateway/service/src/main/java/org/eclipse/ditto/gateway/service/endpoints/utils/DefaultGatewaySignalEnrichmentProvider.java
index cbb135473e..42bd142681 100644
--- a/gateway/service/src/main/java/org/eclipse/ditto/gateway/service/endpoints/utils/DefaultGatewaySignalEnrichmentProvider.java
+++ b/gateway/service/src/main/java/org/eclipse/ditto/gateway/service/endpoints/utils/DefaultGatewaySignalEnrichmentProvider.java
@@ -33,7 +33,7 @@
  */
 public final class DefaultGatewaySignalEnrichmentProvider implements GatewaySignalEnrichmentProvider {
 
-    private static final String CONCIERGE_FORWARDER = "/user/gatewayRoot/" + EdgeCommandForwarderActor.ACTOR_NAME;
+    private static final String COMMAND_FORWARDER = "/user/gatewayRoot/" + EdgeCommandForwarderActor.ACTOR_NAME;
     private static final String CACHE_LOADER_DISPATCHER = "signal-enrichment-cache-dispatcher";
 
     private final SignalEnrichmentFacade facade;
@@ -42,9 +42,10 @@ public final class DefaultGatewaySignalEnrichmentProvider implements GatewaySign
      * Instantiate this provider. Called by reflection.
      *
      * @param actorSystem The actor system for which this provider is instantiated.
+     * @param config the config the extension is configured.
      */
     public DefaultGatewaySignalEnrichmentProvider(final ActorSystem actorSystem, final Config config) {
-        final var commandHandler = actorSystem.actorSelection(CONCIERGE_FORWARDER);
+        final var commandHandler = actorSystem.actorSelection(COMMAND_FORWARDER);
         final var providerConfig = DefaultSignalEnrichmentProviderConfig.of(config);
         final var delegate = ByRoundTripSignalEnrichmentFacade.of(commandHandler, providerConfig.getAskTimeout());
         if (providerConfig.isCachingEnabled()) {
diff --git a/gateway/service/src/main/java/org/eclipse/ditto/gateway/service/security/authentication/jwt/DittoJwtAuthorizationSubjectsProvider.java b/gateway/service/src/main/java/org/eclipse/ditto/gateway/service/security/authentication/jwt/DittoJwtAuthorizationSubjectsProvider.java
index 61cde58c62..cd26f974ca 100644
--- a/gateway/service/src/main/java/org/eclipse/ditto/gateway/service/security/authentication/jwt/DittoJwtAuthorizationSubjectsProvider.java
+++ b/gateway/service/src/main/java/org/eclipse/ditto/gateway/service/security/authentication/jwt/DittoJwtAuthorizationSubjectsProvider.java
@@ -49,7 +49,6 @@ public DittoJwtAuthorizationSubjectsProvider(final ActorSystem actorSystem, fina
     }
 
     private DittoJwtAuthorizationSubjectsProvider(final JwtSubjectIssuersConfig jwtSubjectIssuersConfig) {
-
         this.jwtSubjectIssuersConfig = checkNotNull(jwtSubjectIssuersConfig);
     }
 
diff --git a/gateway/service/src/main/java/org/eclipse/ditto/gateway/service/security/authentication/jwt/JwtAuthorizationSubjectsProvider.java b/gateway/service/src/main/java/org/eclipse/ditto/gateway/service/security/authentication/jwt/JwtAuthorizationSubjectsProvider.java
index df6fc7c8be..faff1cc3c7 100644
--- a/gateway/service/src/main/java/org/eclipse/ditto/gateway/service/security/authentication/jwt/JwtAuthorizationSubjectsProvider.java
+++ b/gateway/service/src/main/java/org/eclipse/ditto/gateway/service/security/authentication/jwt/JwtAuthorizationSubjectsProvider.java
@@ -66,7 +66,6 @@ private ExtensionId(final ExtensionIdConfig<JwtAuthorizationSubjectsProvider> ex
         }
 
         static ExtensionIdConfig<JwtAuthorizationSubjectsProvider> computeConfig(final Config config) {
-
             return ExtensionIdConfig.of(JwtAuthorizationSubjectsProvider.class, config, CONFIG_KEY);
         }
 
diff --git a/gateway/service/src/main/java/org/eclipse/ditto/gateway/service/starter/GatewayRootActor.java b/gateway/service/src/main/java/org/eclipse/ditto/gateway/service/starter/GatewayRootActor.java
index 9eadca4fcf..0539acf733 100755
--- a/gateway/service/src/main/java/org/eclipse/ditto/gateway/service/starter/GatewayRootActor.java
+++ b/gateway/service/src/main/java/org/eclipse/ditto/gateway/service/starter/GatewayRootActor.java
@@ -161,7 +161,6 @@ private GatewayRootActor(final GatewayConfig gatewayConfig, final ActorRef pubSu
                 healthCheckActor, pubSubMediator, healthCheckConfig, jwtAuthenticationFactory,
                 devopsAuthenticationDirectiveFactory, protocolAdapterProvider, headerTranslator);
 
-
         httpBinding = Http.get(actorSystem)
                 .newServerAt(hostname, httpConfig.getPort())
                 .bindFlow(HttpBindFlowProvider.get(actorSystem, dittoExtensionConfig).getFlow(rootRoute))
diff --git a/gateway/service/src/main/java/org/eclipse/ditto/gateway/service/streaming/NoOpAuthorizationEnforcer.java b/gateway/service/src/main/java/org/eclipse/ditto/gateway/service/streaming/NoOpAuthorizationEnforcer.java
index b5b2aaf2a4..d7c5578d03 100644
--- a/gateway/service/src/main/java/org/eclipse/ditto/gateway/service/streaming/NoOpAuthorizationEnforcer.java
+++ b/gateway/service/src/main/java/org/eclipse/ditto/gateway/service/streaming/NoOpAuthorizationEnforcer.java
@@ -29,7 +29,9 @@ public final class NoOpAuthorizationEnforcer implements StreamingAuthorizationEn
 
     /**
      * @param actorSystem the actor system in which to load the extension.
+     *@param config the configuration for this extension.
      */
+    @SuppressWarnings("unused")
     public NoOpAuthorizationEnforcer(final ActorSystem actorSystem, final Config config) {
         //No-Op because extensions need a constructor accepting an actorSystem
     }
diff --git a/gateway/service/src/main/java/org/eclipse/ditto/gateway/service/streaming/StreamingAuthorizationEnforcer.java b/gateway/service/src/main/java/org/eclipse/ditto/gateway/service/streaming/StreamingAuthorizationEnforcer.java
index a17ee9ef99..d17dcabbdf 100644
--- a/gateway/service/src/main/java/org/eclipse/ditto/gateway/service/streaming/StreamingAuthorizationEnforcer.java
+++ b/gateway/service/src/main/java/org/eclipse/ditto/gateway/service/streaming/StreamingAuthorizationEnforcer.java
@@ -43,11 +43,12 @@ public interface StreamingAuthorizationEnforcer extends DittoExtensionPoint {
     CompletionStage<DittoHeaders> checkAuthorization(RequestContext requestContext, DittoHeaders dittoHeaders);
 
     /**
-     * Loads the implementation of {@code WebSocketAuthorizationEnforcer} which is configured for the
+     * Loads the implementation of {@code StreamingAuthorizationEnforcer} which is configured for the
      * {@code ActorSystem}.
      *
-     * @param actorSystem the actorSystem in which the {@code WebSocketAuthorizationEnforcer} should be loaded.
-     * @return the {@code WebSocketAuthorizationEnforcer} implementation.
+     * @param actorSystem the actorSystem in which the {@code StreamingAuthorizationEnforcer} should be loaded.
+     * @param config the configuration for this extension.
+     * @return the {@code StreamingAuthorizationEnforcer} implementation.
      * @throws NullPointerException if {@code actorSystem} is {@code null}.
      * @since 3.0.0
      */
diff --git a/internal/utils/extension/src/main/java/org/eclipse/ditto/internal/utils/extension/DittoExtensionPoint.java b/internal/utils/extension/src/main/java/org/eclipse/ditto/internal/utils/extension/DittoExtensionPoint.java
index 82e64b9dc2..dd4357d205 100644
--- a/internal/utils/extension/src/main/java/org/eclipse/ditto/internal/utils/extension/DittoExtensionPoint.java
+++ b/internal/utils/extension/src/main/java/org/eclipse/ditto/internal/utils/extension/DittoExtensionPoint.java
@@ -110,7 +110,8 @@ public record ExtensionIdConfig<T extends Extension>(Class<T> parentClass,
              * @param configKey the configuration key on root level of the given config.
              * @param <T> The type of the extension that should be initialized.
              * @return the extension id config.
-             * @throws com.typesafe.config.ConfigException.WrongType in case neither an object nor a string is configured at the config key of config.
+             * @throws com.typesafe.config.ConfigException.WrongType in case neither an object nor a string is
+             * configured at the config key of config.
              */
             public static <T extends akka.actor.Extension> ExtensionIdConfig<T> of(
                     final Class<T> parentClass,
@@ -127,6 +128,7 @@ public static <T extends akka.actor.Extension> ExtensionIdConfig<T> of(
             @SuppressWarnings("unchecked")
             public static <T extends Extension> ExtensionIdConfig<T> of(final Class<T> parentClass,
                     final ConfigValue configValue) {
+
                 final var valueType = configValue.valueType();
                 final Object unwrappedValue = configValue.unwrapped();
                 if (valueType == ConfigValueType.OBJECT) {
@@ -148,6 +150,7 @@ private static <T extends Extension> ExtensionIdConfig<T> ofStringConfig(
             private static <T extends Extension> ExtensionIdConfig<T> ofObjectConfig(
                     final Class<T> parentClass,
                     final Config config) {
+
                 @Nullable final String extensionClass;
                 final Config extensionConfig;
                 if (config.hasPath(EXTENSION_CLASS)) {
diff --git a/policies/enforcement/src/main/java/org/eclipse/ditto/policies/enforcement/pre/BlockedNamespacePreEnforcer.java b/policies/enforcement/src/main/java/org/eclipse/ditto/policies/enforcement/pre/BlockedNamespacePreEnforcer.java
index 6aaab1bf1c..e428fc2963 100644
--- a/policies/enforcement/src/main/java/org/eclipse/ditto/policies/enforcement/pre/BlockedNamespacePreEnforcer.java
+++ b/policies/enforcement/src/main/java/org/eclipse/ditto/policies/enforcement/pre/BlockedNamespacePreEnforcer.java
@@ -33,6 +33,7 @@ public final class BlockedNamespacePreEnforcer implements PreEnforcer {
      * Constructs a new instance of BlockedNamespacePreEnforcer extension.
      *
      * @param actorSystem the actor system in which to load the extension.
+     * @param config the configuration for this extension.
      */
     @SuppressWarnings("unused")
     public BlockedNamespacePreEnforcer(final ActorSystem actorSystem, final Config config) {
diff --git a/policies/enforcement/src/main/java/org/eclipse/ditto/policies/enforcement/pre/CommandWithOptionalEntityPreEnforcer.java b/policies/enforcement/src/main/java/org/eclipse/ditto/policies/enforcement/pre/CommandWithOptionalEntityPreEnforcer.java
index 6e23325374..8d5c2f6da5 100644
--- a/policies/enforcement/src/main/java/org/eclipse/ditto/policies/enforcement/pre/CommandWithOptionalEntityPreEnforcer.java
+++ b/policies/enforcement/src/main/java/org/eclipse/ditto/policies/enforcement/pre/CommandWithOptionalEntityPreEnforcer.java
@@ -39,6 +39,7 @@ public final class CommandWithOptionalEntityPreEnforcer implements PreEnforcer {
      * Constructs a new instance of CommandWithOptionalEntityPreEnforcer extension.
      *
      * @param actorSystem the actor system in which to load the extension.
+     * @param config the configuration for this extension.
      */
     @SuppressWarnings("unused")
     public CommandWithOptionalEntityPreEnforcer(final ActorSystem actorSystem, final Config config) {
diff --git a/policies/enforcement/src/main/java/org/eclipse/ditto/policies/enforcement/pre/CreationRestrictionPreEnforcer.java b/policies/enforcement/src/main/java/org/eclipse/ditto/policies/enforcement/pre/CreationRestrictionPreEnforcer.java
index ad67c9dbd1..67276ee1dd 100644
--- a/policies/enforcement/src/main/java/org/eclipse/ditto/policies/enforcement/pre/CreationRestrictionPreEnforcer.java
+++ b/policies/enforcement/src/main/java/org/eclipse/ditto/policies/enforcement/pre/CreationRestrictionPreEnforcer.java
@@ -51,6 +51,7 @@ public final class CreationRestrictionPreEnforcer implements PreEnforcer {
      * Constructs a new instance of CreationRestrictionPreEnforcer extension.
      *
      * @param actorSystem the actor system in which to load the extension.
+     * @param config the configuration for this extension.
      */
     @SuppressWarnings("unused")
     public CreationRestrictionPreEnforcer(final ActorSystem actorSystem, final Config config) {
diff --git a/policies/enforcement/src/main/java/org/eclipse/ditto/policies/enforcement/pre/PreEnforcerProvider.java b/policies/enforcement/src/main/java/org/eclipse/ditto/policies/enforcement/pre/PreEnforcerProvider.java
index bb219af043..401fe6bd60 100644
--- a/policies/enforcement/src/main/java/org/eclipse/ditto/policies/enforcement/pre/PreEnforcerProvider.java
+++ b/policies/enforcement/src/main/java/org/eclipse/ditto/policies/enforcement/pre/PreEnforcerProvider.java
@@ -61,7 +61,6 @@ private PreEnforcerProvider(final ActorSystem actorSystem, final Config config)
                 .toList();
     }
 
-
     /**
      * Applies the pre-enforcement to the signal.
      *
@@ -86,6 +85,7 @@ public CompletionStage<Signal<?>> apply(final Signal<?> signal) {
      * {@code ActorSystem}.
      *
      * @param actorSystem the actorSystem in which the {@code PreEnforcerProvider} should be loaded.
+     * @param config the configuration for this extension.
      * @return the {@code PreEnforcerProvider} implementation.
      * @throws NullPointerException if {@code actorSystem} is {@code null}.
      */
diff --git a/policies/service/src/main/java/org/eclipse/ditto/policies/service/signaltransformation/placeholdersubstitution/PoliciesPlaceholderSubstitution.java b/policies/service/src/main/java/org/eclipse/ditto/policies/service/signaltransformation/placeholdersubstitution/PoliciesPlaceholderSubstitution.java
index fa48783a9c..a168bb3766 100644
--- a/policies/service/src/main/java/org/eclipse/ditto/policies/service/signaltransformation/placeholdersubstitution/PoliciesPlaceholderSubstitution.java
+++ b/policies/service/src/main/java/org/eclipse/ditto/policies/service/signaltransformation/placeholdersubstitution/PoliciesPlaceholderSubstitution.java
@@ -32,6 +32,7 @@ public class PoliciesPlaceholderSubstitution extends AbstractPlaceholderSubstitu
      * Constructs a new instance of PoliciesPlaceholderSubstitutionPreEnforcer extension.
      *
      * @param actorSystem the actor system in which to load the extension.
+     * @param config the configuration for this extension.
      */
     @SuppressWarnings("unused")
     public PoliciesPlaceholderSubstitution(final ActorSystem actorSystem, final Config config) {
diff --git a/things/service/src/main/java/org/eclipse/ditto/things/service/signaltransformation/placeholdersubstitution/ThingsPlaceholderSubstitution.java b/things/service/src/main/java/org/eclipse/ditto/things/service/signaltransformation/placeholdersubstitution/ThingsPlaceholderSubstitution.java
index 861c902f34..451316bd49 100644
--- a/things/service/src/main/java/org/eclipse/ditto/things/service/signaltransformation/placeholdersubstitution/ThingsPlaceholderSubstitution.java
+++ b/things/service/src/main/java/org/eclipse/ditto/things/service/signaltransformation/placeholdersubstitution/ThingsPlaceholderSubstitution.java
@@ -32,6 +32,7 @@ public class ThingsPlaceholderSubstitution extends AbstractPlaceholderSubstituti
      * Constructs a new instance of ThingsPlaceholderSubstitutionPreEnforcer extension.
      *
      * @param actorSystem the actor system in which to load the extension.
+     * @param config the configuration for this extension.
      */
     @SuppressWarnings("unused")
     public ThingsPlaceholderSubstitution(final ActorSystem actorSystem, final Config config) {
diff --git a/thingsearch/service/src/main/java/org/eclipse/ditto/thingsearch/service/persistence/query/validation/DefaultQueryCriteriaValidator.java b/thingsearch/service/src/main/java/org/eclipse/ditto/thingsearch/service/persistence/query/validation/DefaultQueryCriteriaValidator.java
index 4a58ca27a3..603aadcdd6 100644
--- a/thingsearch/service/src/main/java/org/eclipse/ditto/thingsearch/service/persistence/query/validation/DefaultQueryCriteriaValidator.java
+++ b/thingsearch/service/src/main/java/org/eclipse/ditto/thingsearch/service/persistence/query/validation/DefaultQueryCriteriaValidator.java
@@ -30,7 +30,10 @@ public final class DefaultQueryCriteriaValidator implements QueryCriteriaValidat
 
     /**
      * Instantiate this provider. Called by reflection.
+     * @param actorSystem the actor system in which to load the extension.
+     * @param config the configuration for this extension.
      */
+    @SuppressWarnings("unused")
     public DefaultQueryCriteriaValidator(final ActorSystem actorSystem, final Config config) {
         // Nothing to initialize.
     }
diff --git a/thingsearch/service/src/main/java/org/eclipse/ditto/thingsearch/service/persistence/write/streaming/DefaultSearchUpdateMapper.java b/thingsearch/service/src/main/java/org/eclipse/ditto/thingsearch/service/persistence/write/streaming/DefaultSearchUpdateMapper.java
index 45cdf1ea36..f3c3d3ae43 100644
--- a/thingsearch/service/src/main/java/org/eclipse/ditto/thingsearch/service/persistence/write/streaming/DefaultSearchUpdateMapper.java
+++ b/thingsearch/service/src/main/java/org/eclipse/ditto/thingsearch/service/persistence/write/streaming/DefaultSearchUpdateMapper.java
@@ -32,6 +32,8 @@ public final class DefaultSearchUpdateMapper extends SearchUpdateMapper {
 
     /**
      * Instantiate this provider. Called by reflection.
+     * @param actorSystem the actor system in which to load the extension.
+     * @param config the configuration for this extension.
      */
     @SuppressWarnings("unused")
     private DefaultSearchUpdateMapper(final ActorSystem actorSystem, final Config config) {
diff --git a/thingsearch/service/src/main/java/org/eclipse/ditto/thingsearch/service/persistence/write/streaming/DittoCachingSignalEnrichmentFacadeProvider.java b/thingsearch/service/src/main/java/org/eclipse/ditto/thingsearch/service/persistence/write/streaming/DittoCachingSignalEnrichmentFacadeProvider.java
index 776f211934..d6ed3f8311 100644
--- a/thingsearch/service/src/main/java/org/eclipse/ditto/thingsearch/service/persistence/write/streaming/DittoCachingSignalEnrichmentFacadeProvider.java
+++ b/thingsearch/service/src/main/java/org/eclipse/ditto/thingsearch/service/persistence/write/streaming/DittoCachingSignalEnrichmentFacadeProvider.java
@@ -30,7 +30,10 @@ public final class DittoCachingSignalEnrichmentFacadeProvider implements Caching
 
     /**
      * Instantiate this provider. Called by reflection.
+     * @param actorSystem the actor system in which to load the extension.
+     * @param config the configuration for this extension.
      */
+    @SuppressWarnings("unused")
     public DittoCachingSignalEnrichmentFacadeProvider(final ActorSystem actorSystem, final Config config) {
         // No-Op but required for extension initialisation
     }
diff --git a/thingsearch/service/src/main/java/org/eclipse/ditto/thingsearch/service/persistence/write/streaming/SearchUpdateMapper.java b/thingsearch/service/src/main/java/org/eclipse/ditto/thingsearch/service/persistence/write/streaming/SearchUpdateMapper.java
index 53c1aa9500..12a8d04e82 100644
--- a/thingsearch/service/src/main/java/org/eclipse/ditto/thingsearch/service/persistence/write/streaming/SearchUpdateMapper.java
+++ b/thingsearch/service/src/main/java/org/eclipse/ditto/thingsearch/service/persistence/write/streaming/SearchUpdateMapper.java
@@ -69,6 +69,7 @@ public abstract Source<MongoWriteModel, NotUsed> processWriteModel(AbstractWrite
      * Load a {@code SearchUpdateListener} dynamically according to the search configuration.
      *
      * @param actorSystem The actor system in which to load the listener.
+     * @param config the configuration for this extension.
      * @return The listener.
      */
     public static SearchUpdateMapper get(final ActorSystem actorSystem, final Config config) {
diff --git a/thingsearch/service/src/main/java/org/eclipse/ditto/thingsearch/service/updater/actors/SearchUpdateObserver.java b/thingsearch/service/src/main/java/org/eclipse/ditto/thingsearch/service/updater/actors/SearchUpdateObserver.java
index 180a1b1b52..a7a4962f9c 100644
--- a/thingsearch/service/src/main/java/org/eclipse/ditto/thingsearch/service/updater/actors/SearchUpdateObserver.java
+++ b/thingsearch/service/src/main/java/org/eclipse/ditto/thingsearch/service/updater/actors/SearchUpdateObserver.java
@@ -48,6 +48,7 @@ public interface SearchUpdateObserver extends DittoExtensionPoint {
      * {@code ActorSystem}.
      *
      * @param actorSystem the actorSystem in which the {@code SearchUpdateObserver} should be loaded.
+     * @param config the configuration for this extension.
      * @return the {@code SearchUpdateObserver} implementation.
      * @throws NullPointerException if {@code actorSystem} is {@code null}.
      */