added maven wrapper files to root project

.mvn/wrapper/.gitignore

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+maven-wrapper.jar

.mvn/wrapper/MavenWrapperDownloader.java

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+/*
+ * 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.
+ */
+
+import java.io.IOException;
+import java.io.InputStream;
+import java.net.Authenticator;
+import java.net.PasswordAuthentication;
+import java.net.URI;
+import java.net.URL;
+import java.nio.file.Files;
+import java.nio.file.Path;
+import java.nio.file.Paths;
+import java.nio.file.StandardCopyOption;
+import java.util.concurrent.ThreadLocalRandom;
+
+public final class MavenWrapperDownloader {
+    private static final String WRAPPER_VERSION = "3.3.2";
+
+    private static final boolean VERBOSE = Boolean.parseBoolean(System.getenv("MVNW_VERBOSE"));
+
+    public static void main(String[] args) {
+        log("Apache Maven Wrapper Downloader " + WRAPPER_VERSION);
+
+        if (args.length != 2) {
+            System.err.println(" - ERROR wrapperUrl or wrapperJarPath parameter missing");
+            System.exit(1);
+        }
+
+        try {
+            log(" - Downloader started");
+            final URL wrapperUrl = URI.create(args[0]).toURL();
+            final String jarPath = args[1].replace("..", ""); // Sanitize path
+            final Path wrapperJarPath = Paths.get(jarPath).toAbsolutePath().normalize();
+            downloadFileFromURL(wrapperUrl, wrapperJarPath);
+            log("Done");
+        } catch (IOException e) {
+            System.err.println("- Error downloading: " + e.getMessage());
+            if (VERBOSE) {
+                e.printStackTrace();
+            }
+            System.exit(1);
+        }
+    }
+
+    private static void downloadFileFromURL(URL wrapperUrl, Path wrapperJarPath)
+            throws IOException {
+        log(" - Downloading to: " + wrapperJarPath);
+        if (System.getenv("MVNW_USERNAME") != null && System.getenv("MVNW_PASSWORD") != null) {
+            final String username = System.getenv("MVNW_USERNAME");
+            final char[] password = System.getenv("MVNW_PASSWORD").toCharArray();
+            Authenticator.setDefault(new Authenticator() {
+                @Override
+                protected PasswordAuthentication getPasswordAuthentication() {
+                    return new PasswordAuthentication(username, password);
+                }
+            });
+        }
+        Path temp = wrapperJarPath
+                .getParent()
+                .resolve(wrapperJarPath.getFileName() + "."
+                        + Long.toUnsignedString(ThreadLocalRandom.current().nextLong()) + ".tmp");
+        try (InputStream inStream = wrapperUrl.openStream()) {
+            Files.copy(inStream, temp, StandardCopyOption.REPLACE_EXISTING);
+            Files.move(temp, wrapperJarPath, StandardCopyOption.REPLACE_EXISTING);
+        } finally {
+            Files.deleteIfExists(temp);
+        }
+        log(" - Downloader complete");
+    }
+
+    private static void log(String msg) {
+        if (VERBOSE) {
+            System.out.println(msg);
+        }
+    }
+
+}

.mvn/wrapper/maven-wrapper.properties

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+# 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.
+wrapperVersion=3.3.2
+distributionType=source
+distributionUrl=https://repo.maven.apache.org/maven2/org/apache/maven/apache-maven/3.9.9/apache-maven-3.9.9-bin.zip
+wrapperUrl=https://repo.maven.apache.org/maven2/org/apache/maven/wrapper/maven-wrapper/3.3.2/maven-wrapper-3.3.2.jar