Add missing @Override annotations.

httpclient5-cache/src/main/java/org/apache/hc/client5/http/cache/HttpAsyncCacheStorageAdaptor.java

@@ -48,6 +48,7 @@ public final class HttpAsyncCacheStorageAdaptor implements HttpAsyncCacheStorage
         this.cacheStorage = Args.notNull(cacheStorage, "Cache strorage");
     }
 
+    @Override
     public Cancellable putEntry(final String key, final HttpCacheEntry entry, final FutureCallback<Boolean> callback) {
         Args.notEmpty(key, "Key");
         Args.notNull(entry, "Cache ehtry");
@@ -61,6 +62,7 @@ public final class HttpAsyncCacheStorageAdaptor implements HttpAsyncCacheStorage
         return Operations.nonCancellable();
     }
 
+    @Override
     public Cancellable getEntry(final String key, final FutureCallback<HttpCacheEntry> callback) {
         Args.notEmpty(key, "Key");
         Args.notNull(callback, "Callback");
@@ -73,6 +75,7 @@ public final class HttpAsyncCacheStorageAdaptor implements HttpAsyncCacheStorage
         return Operations.nonCancellable();
     }
 
+    @Override
     public Cancellable removeEntry(final String key, final FutureCallback<Boolean> callback) {
         Args.notEmpty(key, "Key");
         Args.notNull(callback, "Callback");
@@ -85,6 +88,7 @@ public final class HttpAsyncCacheStorageAdaptor implements HttpAsyncCacheStorage
         return Operations.nonCancellable();
     }
 
+    @Override
     public Cancellable updateEntry(
             final String key, final HttpCacheCASOperation casOperation, final FutureCallback<Boolean> callback) {
         Args.notEmpty(key, "Key");
@@ -99,6 +103,7 @@ public final class HttpAsyncCacheStorageAdaptor implements HttpAsyncCacheStorage
         return Operations.nonCancellable();
     }
 
+    @Override
     public Cancellable getEntries(final Collection<String> keys, final FutureCallback<Map<String, HttpCacheEntry>> callback) {
         Args.notNull(keys, "Key");
         Args.notNull(callback, "Callback");

httpclient5-testing/src/test/java/org/apache/hc/client5/testing/BasicTestAuthenticator.java

@@ -42,6 +42,7 @@ public class BasicTestAuthenticator implements Authenticator {
         this.realm = realm;
     }
 
+    @Override
     public boolean authenticate(final URIAuthority authority, final String requestUri, final String credentials) {
         return Objects.equals(userToken, credentials);
     }

httpclient5-testing/src/test/java/org/apache/hc/client5/testing/async/TestHttp1AsyncRedirects.java

@@ -169,6 +169,7 @@ public class TestHttp1AsyncRedirects extends AbstractHttpAsyncRedirectsTest<Clos
 
     }
 
+    @Override
     @Test
     public void testBasicRedirect300() throws Exception {
         server.register("*", new Supplier<AsyncServerExchangeHandler>() {

httpclient5-testing/src/test/java/org/apache/hc/client5/testing/sync/TestClientAuthentication.java

@@ -100,6 +100,7 @@ public class TestClientAuthentication extends LocalServerTestBase {
         });
     }
 
+    @Override
     public HttpHost start() throws IOException {
         return start(new BasicTestAuthenticator("test:test", "test realm"));
     }

httpclient5/src/main/java/org/apache/hc/client5/http/impl/RequestCopier.java

@@ -36,6 +36,7 @@ public final class RequestCopier implements MessageCopier<HttpRequest> {
 
     public static final RequestCopier INSTANCE = new RequestCopier();
 
+    @Override
     public HttpRequest copy(final HttpRequest original) {
         if (original == null) {
             return null;

httpclient5/src/main/java/org/apache/hc/client5/http/impl/classic/ClassicRequestCopier.java

@@ -37,6 +37,7 @@ public final class ClassicRequestCopier implements MessageCopier<ClassicHttpRequ
 
     public static final ClassicRequestCopier INSTANCE = new ClassicRequestCopier();
 
+    @Override
     public ClassicHttpRequest copy(final ClassicHttpRequest original) {
         if (original == null) {
             return null;