improve code style

app/src/main/java/org/cutem/cutecalendar/model/TodoItemManager.java

@@ -17,12 +17,6 @@ public class TodoItemManager {
     }
 
 
-    private TodoItemManager() {
-        //empty
-    }
-
-
-
     private long mIdCount;
 
 
@@ -38,6 +32,12 @@ public class TodoItemManager {
     private HashMap<Long, TodoItem> mIdCache = new HashMap<>();
 
 
+    private TodoItemManager() {
+        //empty
+    }
+
+
+
     public long getNextId() {
         while (mIdCache.containsKey(mIdCount)) {
             ++mIdCount;