diff --git a/poi-ooxml/src/main/java/org/apache/poi/xssf/model/ThemesTable.java b/poi-ooxml/src/main/java/org/apache/poi/xssf/model/ThemesTable.java
index 7bd391a06b..4d6655d5fc 100644
--- a/poi-ooxml/src/main/java/org/apache/poi/xssf/model/ThemesTable.java
+++ b/poi-ooxml/src/main/java/org/apache/poi/xssf/model/ThemesTable.java
@@ -36,32 +36,34 @@ import org.openxmlformats.schemas.drawingml.x2006.main.ThemeDocument;
  * colors and fonts.
  */
 public class ThemesTable extends POIXMLDocumentPart implements Themes {
-   public enum ThemeElement {
-       LT1(0, "Lt1"),
-       DK1(1,"Dk1"),
-       LT2(2,"Lt2"),
-       DK2(3,"Dk2"),
-       ACCENT1(4,"Accent1"),
-       ACCENT2(5,"Accent2"),
-       ACCENT3(6,"Accent3"),
-       ACCENT4(7,"Accent4"),
-       ACCENT5(8,"Accent5"),
-       ACCENT6(9,"Accent6"),
-       HLINK(10,"Hlink"),
-       FOLHLINK(11,"FolHlink"),
-       UNKNOWN(-1,null);
+    public enum ThemeElement {
+        LT1(0, "Lt1"),
+        DK1(1, "Dk1"),
+        LT2(2, "Lt2"),
+        DK2(3, "Dk2"),
+        ACCENT1(4, "Accent1"),
+        ACCENT2(5, "Accent2"),
+        ACCENT3(6, "Accent3"),
+        ACCENT4(7, "Accent4"),
+        ACCENT5(8, "Accent5"),
+        ACCENT6(9, "Accent6"),
+        HLINK(10, "Hlink"),
+        FOLHLINK(11, "FolHlink"),
+        UNKNOWN(-1, null);
 
-       public static ThemeElement byId(int idx) {
-           if (idx >= values().length || idx < 0) return UNKNOWN;
-           return values()[idx];
-       }
-       ThemeElement(int idx, String name) {
-           this.idx = idx;
-           this.name = name;
-       }
-       public final int idx;
-       public final String name;
-   }
+        public static ThemeElement byId(int idx) {
+            if (idx >= values().length || idx < 0) return UNKNOWN;
+            return values()[idx];
+        }
+
+        ThemeElement(int idx, String name) {
+            this.idx = idx;
+            this.name = name;
+        }
+
+        public final int idx;
+        public final String name;
+    }
 
     private IndexedColorMap colorMap;
     private ThemeDocument theme;