java/graph: fix javadoc errors

java/server/src/main/java/org/softwareheritage/graph/Graph.java

@@ -24,9 +24,9 @@ import org.softwareheritage.graph.backend.NodeTypesMap;
  * PID lookup.
  *
  * @author The Software Heritage developers
- * @see org.softwareheritage.graph.AllowedEdges
- * @see org.softwareheritage.graph.NodeIdMap;
- * @see org.softwareheritage.graph.NodeTypesMap;
+ * @see org.softwareheritage.graph.AllowedEdges;
+ * @see org.softwareheritage.graph.backend.NodeIdMap;
+ * @see org.softwareheritage.graph.backend.NodeTypesMap;
  */
 
 public class Graph implements FlyweightPrototype<Graph> {

java/server/src/main/java/org/softwareheritage/graph/SwhPath.java

@@ -63,7 +63,7 @@ public class SwhPath {
     /**
      * Adds a {@link SwhPID} to this path.
      *
-     * @param {@link SwhPID} to add to this path
+     * @param swhPID {@link SwhPID} to add to this path
      * @see org.softwareheritage.graph.SwhPID
      */
     public void add(SwhPID swhPID) {