Fix style check issues

src/main/java/de/uni/bremen/grapa/library/algorithms/vertexcover/NativeVcSolver.java

@@ -4,7 +4,12 @@ import de.uni.bremen.grapa.library.graphs.api.DirectedEdge;
 import de.uni.bremen.grapa.library.graphs.api.DirectedGraph;
 import de.uni.bremen.grapa.library.graphs.api.Vertex;
 
-import java.io.*;
+import java.io.BufferedInputStream;
+import java.io.File;
+import java.io.IOException;
+import java.io.InputStream;
+import java.io.PrintWriter;
+import java.io.OutputStreamWriter;
 import java.nio.file.Files;
 import java.nio.file.StandardCopyOption;
 import java.util.HashSet;
@@ -33,7 +38,7 @@ public class NativeVcSolver {
 
         if (!solver.exists()) {
             // Use packaged vc_solver instead
-            try (InputStream solverResource = (getClass().getResourceAsStream("/vc_solver"))){
+            try (InputStream solverResource = (getClass().getResourceAsStream("/vc_solver"))) {
                 solver = File.createTempFile("vc_solver", "");
                 assert solverResource != null;
                 Files.copy(solverResource, solver.toPath(), StandardCopyOption.REPLACE_EXISTING);