test(dijkstra): close open file readers

be-graphes-algos/src/test/java/org/insa/graphs/algorithm/shortestpath/DijkstraAlgorithmTest.java

@@ -40,9 +40,13 @@ public class DijkstraAlgorithmTest {
 
             // Read the graph. X
             this.graph = reader.read();
+            // free resources
+            reader.close();
 
             // Create a PathReader.
             final PathReader pathReader = new BinaryPathReader(new DataInputStream(new BufferedInputStream(new FileInputStream(pathName))));
+            // free resources
+            pathReader.close();
 
             // Read the path.
             this.path = pathReader.readPath(graph);