diff --git a/main/src/com/google/refine/model/Project.java b/main/src/com/google/refine/model/Project.java
index 8ad1b4d50..7d35f29d2 100644
--- a/main/src/com/google/refine/model/Project.java
+++ b/main/src/com/google/refine/model/Project.java
@@ -43,7 +43,6 @@ import java.io.Writer;
 import java.lang.reflect.Method;
 import java.time.LocalDateTime;
 import java.util.ArrayList;
-import java.util.Date;
 import java.util.HashMap;
 import java.util.List;
 import java.util.Map;
@@ -67,17 +66,11 @@ public class Project {
     final static protected Map<String, Class<? extends OverlayModel>> 
         s_overlayModelClasses = new HashMap<String, Class<? extends OverlayModel>>();
     
-    static public void registerOverlayModel(String modelName, Class<? extends OverlayModel> klass) {
-        s_overlayModelClasses.put(modelName, klass);
-    }
-    
     final public long                       id;
     final public List<Row>                  rows = new ArrayList<Row>();
-    
     final public ColumnModel                columnModel = new ColumnModel();
     final public RecordModel                recordModel = new RecordModel();
     final public Map<String, OverlayModel>  overlayModels = new HashMap<String, OverlayModel>();
-    
     final public History                    history;
     
     transient public ProcessManager processManager = new ProcessManager();
@@ -99,6 +92,10 @@ public class Project {
         this.history = new History(this);
     }
     
+    static public void registerOverlayModel(String modelName, Class<? extends OverlayModel> klass) {
+        s_overlayModelClasses.put(modelName, klass);
+    }
+    
     /**
      * Free/dispose of project data from memory.
      */