Another try

src/main/java/at/ac/uibk/gitsearch/service/ExerciseService.java

@@ -89,6 +89,7 @@ public class ExerciseService {
         }
         gitlabService.commitAndPushToRepo(repo, new File("tmp-import", exerciseToken));
 
+        repo.close();
         try {
             FileUtils.deleteDirectory(new File("tmp-import", exerciseToken));
         } catch (IOException e) {

src/main/java/at/ac/uibk/gitsearch/service/GitlabService.java

@@ -252,12 +252,8 @@ public class GitlabService {
                 FileUtils.deleteDirectory(dst);
             } catch (IOException e) {
                 log.error("Unable to remove directory. Trying to rename it.. : {} \n", e.getMessage());
-                try {
-                    if (dst.renameTo(new File("delete_me", dst.getName()))) {
-                        log.error("Unable to rename directory. Trying to overwrite it..");
-                    }
-                } catch (SecurityException se) {
-                    log.error("Unable to rename directory. Trying to overwrite it.. : {}", se.getMessage());
+                if (!dst.renameTo(new File("delete_me", dst.getName()))) {
+                    log.error("Unable to rename directory.");
                 }
             }
         }