diff --git a/lucene/test-framework/src/java/org/apache/lucene/util/TestRuleRestoreSystemProperties.java b/lucene/test-framework/src/java/org/apache/lucene/util/TestRuleRestoreSystemProperties.java
index 391d4ed08b6..395af0e7fb9 100644
--- a/lucene/test-framework/src/java/org/apache/lucene/util/TestRuleRestoreSystemProperties.java
+++ b/lucene/test-framework/src/java/org/apache/lucene/util/TestRuleRestoreSystemProperties.java
@@ -1,78 +1,78 @@
-package org.apache.lucene.util;
-
-import java.util.HashMap;
-import java.util.List;
-import java.util.Map;
-
-import com.carrotsearch.randomizedtesting.rules.SystemPropertiesRestoreRule;
-import com.carrotsearch.randomizedtesting.rules.TestRuleAdapter;
-
-/*
- * 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.
- */
-
-/**
- * Restore a given set of system properties to a snapshot taken at the beginning
- * of the rule.
- * 
- * This is semantically similar to {@link SystemPropertiesRestoreRule} but
- * the list of properties to restore must be provided explicitly (because the security
- * manager prevents us from accessing the whole set of properties).
- * 
- * All properties to be restored must have r/w property permission.
- */
-public class TestRuleRestoreSystemProperties extends TestRuleAdapter {  
-  private final String[] propertyNames;
-  private final Map<String, String> restore = new HashMap<String, String>();
-
-  public TestRuleRestoreSystemProperties(String... propertyNames) {
-    this.propertyNames = propertyNames;
-    
-    if (propertyNames.length == 0) {
-      throw new IllegalArgumentException("No properties to restore? Odd.");
-    }
-  }
-
-  @Override
-  protected void before() throws Throwable {
-    super.before();
-
-    assert restore.isEmpty();
-    for (String key : propertyNames) {
-      restore.put(key, System.getProperty(key));
-    }
-  }
-  
-  @Override
-  protected void afterAlways(List<Throwable> errors) throws Throwable {
-    for (String key : propertyNames) {
-      try {
-        String value = restore.get(key);
-        if (value == null) {
-          System.clearProperty(key);
-        } else {
-          System.setProperty(key, value);
-        }
-      } catch (SecurityException e) {
-        // We should have permission to write but if we don't, record the error
-        errors.add(e);
-      }
-    }
-    restore.clear();
-
-    super.afterAlways(errors);
-  }
-}
+package org.apache.lucene.util;
+
+import java.util.HashMap;
+import java.util.List;
+import java.util.Map;
+
+import com.carrotsearch.randomizedtesting.rules.SystemPropertiesRestoreRule;
+import com.carrotsearch.randomizedtesting.rules.TestRuleAdapter;
+
+/*
+ * 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.
+ */
+
+/**
+ * Restore a given set of system properties to a snapshot taken at the beginning
+ * of the rule.
+ * 
+ * This is semantically similar to {@link SystemPropertiesRestoreRule} but
+ * the list of properties to restore must be provided explicitly (because the security
+ * manager prevents us from accessing the whole set of properties).
+ * 
+ * All properties to be restored must have r/w property permission.
+ */
+public class TestRuleRestoreSystemProperties extends TestRuleAdapter {  
+  private final String[] propertyNames;
+  private final Map<String, String> restore = new HashMap<String, String>();
+
+  public TestRuleRestoreSystemProperties(String... propertyNames) {
+    this.propertyNames = propertyNames;
+    
+    if (propertyNames.length == 0) {
+      throw new IllegalArgumentException("No properties to restore? Odd.");
+    }
+  }
+
+  @Override
+  protected void before() throws Throwable {
+    super.before();
+
+    assert restore.isEmpty();
+    for (String key : propertyNames) {
+      restore.put(key, System.getProperty(key));
+    }
+  }
+  
+  @Override
+  protected void afterAlways(List<Throwable> errors) throws Throwable {
+    for (String key : propertyNames) {
+      try {
+        String value = restore.get(key);
+        if (value == null) {
+          System.clearProperty(key);
+        } else {
+          System.setProperty(key, value);
+        }
+      } catch (SecurityException e) {
+        // We should have permission to write but if we don't, record the error
+        errors.add(e);
+      }
+    }
+    restore.clear();
+
+    super.afterAlways(errors);
+  }
+}