Adds various fixes to make the two java versions work as expected

Makes it possible to load a controller without generating a GUI, for better testing
Makes sure not to try and parse empty profile lines
Saves controller settings in a more readable and appendable format
Adds code for using the correct java version for the occasion
Adds a new function for writing to files

src/test/java/net/knarcraft/minecraftserverlauncher/utility/JarBuilderTest.java

@@ -1,14 +1,17 @@
 package net.knarcraft.minecraftserverlauncher.utility;
 
 import net.knarcraft.minecraftserverlauncher.Main;
+import net.knarcraft.minecraftserverlauncher.profile.ServerLauncherController;
 import net.knarcraft.minecraftserverlauncher.userinterface.FakeGUI;
 import org.junit.jupiter.api.AfterAll;
+import org.junit.jupiter.api.BeforeAll;
 import org.junit.jupiter.api.BeforeEach;
 import org.junit.jupiter.api.MethodOrderer;
 import org.junit.jupiter.api.Order;
 import org.junit.jupiter.api.Test;
 import org.junit.jupiter.api.TestMethodOrder;
 
+import javax.naming.ConfigurationException;
 import java.io.File;
 import java.io.IOException;
 
@@ -22,6 +25,15 @@ public class JarBuilderTest {
     private static String targetDirectory;
     private static String jarDirectory;
 
+    @BeforeAll
+    public static void preSetUp() {
+        try {
+            ServerLauncherController.getInstance().loadState(true);
+        } catch (ConfigurationException | IOException e) {
+            e.printStackTrace();
+        }
+    }
+
     @BeforeEach
     public void setUp() {
         targetDirectory = Main.getApplicationWorkDirectory() + File.separator + "files" + File.separator +