Lot of stuff

src/main/java/app/settings/SettingsProvider.java

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+package app.settings;
+
+import java.io.File;
+import java.io.IOException;
+import java.io.PrintWriter;
+import java.util.ArrayList;
+import java.util.Arrays;
+import java.util.List;
+import java.util.Scanner;
+
+import com.google.common.eventbus.EventBus;
+import com.google.common.eventbus.Subscribe;
+
+import app.events.LanguageChangedEvent;
+import app.events.ThemeChangedEvent;
+import app.model.Model;
+
+public class SettingsProvider implements SettingsProviderI {
+
+    private static EventBus eventBus;
+    private static final String SETTINGS_PATH = "/BNNsettings/settings.dat";
+
+    public SettingsProvider(EventBus eB) {
+        setEventBus(eB);
+        Model.setSettingsProvider(this);
+    }
+
+    public void setEventBus(EventBus eB) {
+        eventBus = eB;
+        SettingsProvider.eventBus.register(this);
+    }
+
+    @Override
+    public void loadSettings() {
+        List<String> settings = new ArrayList<>();
+        List<String> legalSettings = Arrays.asList("Java", "Markdown", "Monokai", "Solarized Light");
+        try (Scanner sc = new Scanner(new File(getClass().getResource(SETTINGS_PATH).getPath()))) {
+
+            while (sc.hasNextLine()) {
+                var nextLine = sc.nextLine().trim();
+                if (nextLine.isEmpty() || nextLine.startsWith("-")) {
+                    continue;
+                } else {
+                    settings.add(nextLine.substring(nextLine.indexOf("=") + 2));
+                }
+            }
+
+            if (legalSettings.containsAll(settings)) {
+                eventBus.post(new LanguageChangedEvent(settings.get(0)));
+                eventBus.post(new ThemeChangedEvent(settings.get(1)));
+            } else {
+                throw new IOException();
+            }
+
+        } catch (IOException e) {
+            eventBus.post(new LanguageChangedEvent("Java"));
+            eventBus.post(new ThemeChangedEvent("Monokai"));
+        }
+
+    }
+
+    @Override
+    public void saveSettings() {
+        try (PrintWriter writer = new PrintWriter(new File(getClass().getResource(SETTINGS_PATH).getPath()))) {
+            writer.println("- Settings:");
+            writer.println("Programming Language = " + Model.getLanguage().getName());
+            writer.println("Theme = " + Model.getTheme());
+        } catch (IOException e) {
+            System.err.println(e);
+        }
+
+    }
+
+    @Subscribe
+    private void handle(ThemeChangedEvent event) {
+        saveSettings();
+    }
+
+    @Subscribe
+    private void handle(LanguageChangedEvent event) {
+        saveSettings();
+    }
+
+}

src/main/java/app/settings/SettingsProviderI.java

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+package app.settings;
+
+public interface SettingsProviderI {
+
+    void loadSettings();
+
+    void saveSettings();
+
+}