Rename package-private constant consistently.

Author: Gary Gregory

src/main/java/org/apache/commons/io/monitor/FileAlterationObserver.java

@@ -324,7 +324,7 @@ public void checkAndNotify() {
      */
     private void checkAndNotify(final FileEntry parent, final FileEntry[] previous, final File[] files) {
         int c = 0;
-        final FileEntry[] current = files.length > 0 ? new FileEntry[files.length] : FileEntry.EMPTY_ENTRIES;
+        final FileEntry[] current = files.length > 0 ? new FileEntry[files.length] : FileEntry.EMPTY_FILE_ENTRY_ARRAY;
         for (final FileEntry entry : previous) {
             while (c < files.length && comparator.compare(entry.getFile(), files[c]) > 0) {
                 current[c] = createFileEntry(parent, files[c]);
@@ -371,7 +371,7 @@ private FileEntry createFileEntry(final FileEntry parent, final File file) {
      */
     private FileEntry[] doListFiles(final File file, final FileEntry entry) {
         final File[] files = listFiles(file);
-        final FileEntry[] children = files.length > 0 ? new FileEntry[files.length] : FileEntry.EMPTY_ENTRIES;
+        final FileEntry[] children = files.length > 0 ? new FileEntry[files.length] : FileEntry.EMPTY_FILE_ENTRY_ARRAY;
         for (int i = 0; i < files.length; i++) {
             children[i] = createFileEntry(entry, files[i]);
         }

src/main/java/org/apache/commons/io/monitor/FileEntry.java

@@ -44,7 +44,7 @@ public class FileEntry implements Serializable {
 
     private static final long serialVersionUID = -2505664948818681153L;
 
-    static final FileEntry[] EMPTY_ENTRIES = new FileEntry[0];
+    static final FileEntry[] EMPTY_FILE_ENTRY_ARRAY = new FileEntry[0];
 
     private final FileEntry parent;
     private FileEntry[] children;
@@ -154,7 +154,7 @@ public int getLevel() {
      * directory is empty
      */
     public FileEntry[] getChildren() {
-        return children != null ? children : EMPTY_ENTRIES;
+        return children != null ? children : EMPTY_FILE_ENTRY_ARRAY;
     }
 
     /**