Fix linting issues

Author: ljacqu

src/main/java/ch/jalu/configme/configurationdata/CommentsConfiguration.java

@@ -16,10 +16,11 @@
  */
 public class CommentsConfiguration {
 
-    private final @NotNull Map<String, List<String>> comments;
-
+    /** Fake path under which footer comments are registered. */
     public static final String FOOTER_KEY = "..FOOTER";
 
+    private final @NotNull Map<String, List<String>> comments;
+
     /**
      * Constructor.
      */

src/test/java/ch/jalu/configme/resource/YamlFileResourceFooterCommentTest.java

@@ -14,7 +14,7 @@
 import java.io.IOException;
 import java.nio.file.Files;
 import java.nio.file.Path;
-import java.util.*;
+import java.util.List;
 
 import static org.hamcrest.MatcherAssert.assertThat;
 import static org.hamcrest.Matchers.contains;