8346049: jdk/test/lib/security/timestamp/TsaServer.java warnings

Reviewed-by: weijun, rhalade, hchao, lmesnik

Author: fguallini

test/lib/jdk/test/lib/security/timestamp/TsaServer.java

@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 2020, 2022, Oracle and/or its affiliates. All rights reserved.
+ * Copyright (c) 2020, 2025, Oracle and/or its affiliates. All rights reserved.
  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
  *
  * This code is free software; you can redistribute it and/or modify it
@@ -87,7 +87,7 @@ public TsaServer(int port, KeyStore keyStore, String passphrase)
      *
      * @param handler a {@link TsaHandler}
      */
-    public void setHandler(TsaHandler handler) {
+    public final void setHandler(TsaHandler handler) {
         server.createContext("/", handler);
     }
 
@@ -113,7 +113,7 @@ public int getPort() {
     }
 
     @Override
-    public void close() throws Exception {
+    public void close() {
         stop();
     }
 }