@Override protected GraphTransactionalImpl createInstance() throws Exception { GraphDatabaseService graphDb = new GraphDatabaseFactory().newEmbeddedDatabase(new File(path).toString()); Neo4jConfiguration config = new Neo4jConfiguration(); config .getExactNodeProperties() .addAll( newHashSet( NodeProperties.LABEL, Concept.SYNONYM, Concept.ABREVIATION, Concept.ACRONYM)); config .getIndexedNodeProperties() .addAll( newHashSet( NodeProperties.LABEL, Concept.CATEGORY, Concept.SYNONYM, Concept.ABREVIATION, Concept.ACRONYM)); Neo4jModule.setupAutoIndexing(graphDb, config); IdMap idMap = new IdMap(); RelationshipMap relationahipMap = new RelationshipMap(); return new GraphTransactionalImpl(graphDb, idMap, relationahipMap); }