Tries a new fix to remove the pesky FileNotFoundException caused by the server version container

src/main/java/net/knarcraft/minecraftserverlauncher/server/ServerVersionContainer.java

@@ -92,6 +92,11 @@ public class ServerVersionContainer implements java.io.Serializable {
         PrintWriter file;
         try {
             if (!saveFile.exists()) {
+                if (!saveFile.getParentFile().exists()) {
+                    if (!saveFile.getParentFile().mkdirs()) {
+                        throw new FileNotFoundException("Unable to create folder for version file");
+                    }
+                }
                 if (!saveFile.createNewFile()) {
                     throw new FileNotFoundException("Unable to create version file");
                 }

src/main/java/net/knarcraft/minecraftserverlauncher/utility/CommonFunctions.java

@@ -1,5 +1,6 @@
 package net.knarcraft.minecraftserverlauncher.utility;
 
+import net.knarcraft.minecraftserverlauncher.Main;
 import net.knarcraft.minecraftserverlauncher.userinterface.ServerLauncherGUI;
 
 import java.io.*;
@@ -20,6 +21,33 @@ import java.util.Scanner;
  */
 public final class CommonFunctions {
 
+    private static String filesDirectory = Main.getApplicationWorkDirectory() + File.separator + "files";
+
+    /**
+     * Creates all folders necessary for tests and normal operation
+     *
+     * @throws FileNotFoundException <p>If unable to create a folder</p>
+     */
+    public static void createAllFolders() throws FileNotFoundException {
+        createFolder(new File(filesDirectory));
+        createFolder(new File(filesDirectory + File.separator + "Jars"));
+        createFolder(new File(filesDirectory + File.separator + "testjars"));
+    }
+
+    /**
+     * Creates a given folder
+     *
+     * @param folder <p>The folder to create</p>
+     * @throws FileNotFoundException <p>If unable to create the folder</p>
+     */
+    private static void createFolder(File folder) throws FileNotFoundException {
+        if (!folder.exists()) {
+            if (!folder.mkdirs()) {
+                throw new FileNotFoundException("Cannot create necessary directory.");
+            }
+        }
+    }
+
     /**
      * Gets a resource as an InputStream
      *

src/test/java/net/knarcraft/minecraftserverlauncher/server/ServerVersionContainerTest.java

@@ -8,14 +8,21 @@ import org.junit.Test;
 import java.io.*;
 
 import static junit.framework.TestCase.assertEquals;
+import static net.knarcraft.minecraftserverlauncher.utility.CommonFunctions.createAllFolders;
 
 public class ServerVersionContainerTest {
 
-    private String versionFile = Main.getApplicationWorkDirectory() + File.separator + "files" + File.separator + "versions.csv";
+    private final String filesDirectory = Main.getApplicationWorkDirectory() + File.separator + "files";
+    private String versionFile = filesDirectory + File.separator + "versions.csv";
     private ServerVersionContainer serverVersionContainer;
 
     @Before
     public void setUp() {
+        try {
+            createAllFolders();
+        } catch (FileNotFoundException e) {
+            e.printStackTrace();
+        }
         serverVersionContainer = ServerVersionContainer.getInstance();
     }