Fix review feedback

common/utils/src/main/java/org/graalvm/buildtools/utils/ExponentialBackoff.java

@@ -24,13 +24,13 @@
  */
 public class ExponentialBackoff {
  private static final int DEFAULT_MAX_RETRIES = 3;
- private static final Duration INITIAL_WAIT_PERIOD = Duration.of(250, ChronoUnit.MILLIS);
+ private static final Duration DEFAULT_INITIAL_WAIT_PERIOD = Duration.of(250, ChronoUnit.MILLIS);
 
  private final int maxRetries;
  private final Duration initialWaitPeriod;
 
  public ExponentialBackoff() {
- this(DEFAULT_MAX_RETRIES, INITIAL_WAIT_PERIOD);
+ this(DEFAULT_MAX_RETRIES, DEFAULT_INITIAL_WAIT_PERIOD);
  }
 
  private ExponentialBackoff(int maxRetries, Duration initialWaitPeriod) {

common/utils/src/test/java/org/graalvm/buildtools/utils/ExponentialBackoffTest.java

@@ -1,3 +1,18 @@
+/*
+ * Copyright 2024 the original author or authors.
+ *
+ * Licensed 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
+ *
+ * https://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.graalvm.buildtools.utils;
 
 import org.junit.jupiter.api.DisplayName;