refactor: use package name following Java guidelines

src/main/java/dev/dnpm/services/therapieplan/TherapieplanServiceFactory.java

@@ -0,0 +1,33 @@
+package dev.dnpm.services.therapieplan;
+
+import dev.dnpm.services.FormService;
+import dev.dnpm.services.SettingsService;
+import de.itc.onkostar.api.IOnkostarApi;
+
+public class TherapieplanServiceFactory {
+
+    private final IOnkostarApi onkostarApi;
+
+    private final SettingsService settingsService;
+
+    private final FormService formService;
+
+    public TherapieplanServiceFactory(
+            final IOnkostarApi onkostarApi,
+            final SettingsService settingsService,
+            final FormService formService
+    ) {
+        this.onkostarApi = onkostarApi;
+        this.settingsService = settingsService;
+        this.formService = formService;
+    }
+
+    public TherapieplanService currentUsableInstance() {
+        if (settingsService.multipleMtbsInMtbEpisode()) {
+            return new MultipleMtbTherapieplanService(onkostarApi, formService);
+        }
+
+        return new DefaultTherapieplanService(onkostarApi, formService);
+    }
+
+}