diff --git a/java/server/src/main/java/org/softwareheritage/graph/backend/NodeTypesMap.java b/java/server/src/main/java/org/softwareheritage/graph/backend/NodeTypesMap.java
index cf2be75..9bae82b 100644
--- a/java/server/src/main/java/org/softwareheritage/graph/backend/NodeTypesMap.java
+++ b/java/server/src/main/java/org/softwareheritage/graph/backend/NodeTypesMap.java
@@ -1,51 +1,53 @@
 package org.softwareheritage.graph.backend;
 
 import java.io.IOException;
 
 import it.unimi.dsi.fastutil.io.BinIO;
 import it.unimi.dsi.fastutil.longs.LongBigList;
 
 import org.softwareheritage.graph.Graph;
 import org.softwareheritage.graph.Node;
 
 /**
  * Mapping between long node id and SWH node type as described in the <a
  * href="https://docs.softwareheritage.org/devel/swh-model/data-model.html">data model</a>.
  * <p>
  * The type mapping is pre-computed and dumped on disk in the {@link Setup} class, then it is loaded
  * in-memory here using <a href="http://fastutil.di.unimi.it/">fastutil</a> LongBigList. To be
  * space-efficient, the mapping is stored as a bitmap using minimum number of bits per {@link
  * Node.Type}.
  *
  * @author The Software Heritage developers
  */
 
 public class NodeTypesMap {
-    /** Array storing for each node its type */
-    LongBigList nodeTypesMap;
+    /**
+     * Array storing for each node its type
+     */
+    public LongBigList nodeTypesMap;
 
     /**
      * Constructor.
      *
      * @param graphPath path and basename of the compressed graph
      */
     public NodeTypesMap(String graphPath) throws IOException {
         try {
             nodeTypesMap = (LongBigList) BinIO.loadObject(graphPath + Graph.NODE_TO_TYPE);
         } catch (ClassNotFoundException e) {
             throw new IllegalArgumentException("Unknown class object: " + e);
         }
     }
 
     /**
      * Returns node type from a node long id.
      *
      * @param nodeId node as a long id
      * @return corresponding {@link Node.Type} value
      * @see org.softwareheritage.graph.Node.Type
      */
     public Node.Type getType(long nodeId) {
         long type = nodeTypesMap.getLong(nodeId);
         return Node.Type.fromInt((int) type);
     }
 }