Fix unused stream in DefaultPluginXmlFactory#write

impl/maven-impl/src/main/java/org/apache/maven/impl/DefaultPluginXmlFactory.java

@@ -93,7 +93,7 @@ public void write(XmlWriterRequest<PluginDescriptor> request) throws XmlWriterEx
                 new PluginDescriptorStaxWriter().write(outputStream, content);
             } else {
                 try (OutputStream os = Files.newOutputStream(path)) {
-                    new PluginDescriptorStaxWriter().write(outputStream, content);
+                    new PluginDescriptorStaxWriter().write(os, content);
                 }
             }
         } catch (Exception e) {

impl/maven-impl/src/test/java/org/apache/maven/impl/DefaultPluginXmlFactoryTest.java

@@ -0,0 +1,47 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one
+ * or more contributor license agreements.  See the NOTICE file
+ * distributed with this work for additional information
+ * regarding copyright ownership.  The ASF licenses this file
+ * to you under the Apache License, Version 2.0 (the
+ * "License"); you may not use this file except in compliance
+ * with the License.  You may obtain a copy of the License at
+ *
+ *   http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing,
+ * software distributed under the License is distributed on an
+ * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+ * KIND, either express or implied.  See the License for the
+ * specific language governing permissions and limitations
+ * under the License.
+ */
+package org.apache.maven.impl;
+
+import java.nio.file.Files;
+import java.nio.file.Path;
+
+import org.apache.maven.api.plugin.descriptor.PluginDescriptor;
+import org.apache.maven.api.services.xml.XmlWriterRequest;
+import org.junit.jupiter.api.Test;
+import org.junit.jupiter.api.io.TempDir;
+
+import static org.assertj.core.api.Assertions.assertThat;
+
+class DefaultPluginXmlFactoryReadWriteTest {
+
+    private final DefaultPluginXmlFactory defaultPluginXmlFactory = new DefaultPluginXmlFactory();
+
+    @TempDir
+    Path tempDir;
+
+    @Test
+    void writeToPathGeneratesValidXmlFile() throws Exception {
+        Path xmlFile = tempDir.resolve("output-plugin.xml");
+        defaultPluginXmlFactory.write(XmlWriterRequest.<PluginDescriptor>builder()
+                .path(xmlFile)
+                .content(PluginDescriptor.newBuilder().name("Sample Plugin").build())
+                .build());
+        assertThat(Files.readString(xmlFile)).contains("<name>Sample Plugin</name>");
+    }
+}