Make SyncClientClass extend SyncClientInterface (#3740)

* Make SyncClientClass extend SyncClientInterface

* remove unused import

* Make SyncClientInterface not final

Author: davidh44

codegen/src/main/java/software/amazon/awssdk/codegen/poet/client/SyncClientClass.java

@@ -43,7 +43,6 @@
 import software.amazon.awssdk.codegen.model.intermediate.IntermediateModel;
 import software.amazon.awssdk.codegen.model.intermediate.OperationModel;
 import software.amazon.awssdk.codegen.model.intermediate.Protocol;
-import software.amazon.awssdk.codegen.poet.ClassSpec;
 import software.amazon.awssdk.codegen.poet.PoetExtension;
 import software.amazon.awssdk.codegen.poet.PoetUtils;
 import software.amazon.awssdk.codegen.poet.client.specs.Ec2ProtocolSpec;
@@ -64,15 +63,15 @@
 import software.amazon.awssdk.metrics.NoOpMetricCollector;
 import software.amazon.awssdk.utils.Logger;
 
-//TODO Make SyncClientClass extend SyncClientInterface (similar to what we do in AsyncClientClass)
-public class SyncClientClass implements ClassSpec {
+public class SyncClientClass extends SyncClientInterface {
 
     private final IntermediateModel model;
     private final PoetExtension poetExtensions;
     private final ClassName className;
     private final ProtocolSpec protocolSpec;
 
     public SyncClientClass(GeneratorTaskParams taskParams) {
+        super(taskParams.getModel());
         this.model = taskParams.getModel();
         this.poetExtensions = taskParams.getPoetExtensions();
         this.className = poetExtensions.getClientClass(model.getMetadata().getSyncClient());

codegen/src/main/java/software/amazon/awssdk/codegen/poet/client/SyncClientInterface.java

@@ -62,7 +62,7 @@
 import software.amazon.awssdk.regions.ServiceMetadataProvider;
 import software.amazon.awssdk.regions.providers.DefaultAwsRegionProviderChain;
 
-public final class SyncClientInterface implements ClassSpec {
+public class SyncClientInterface implements ClassSpec {
 
     private final IntermediateModel model;
     private final ClassName className;