diff --git a/src/controllers/PdfController.ts b/src/controllers/PdfController.ts
index 5bd60ca..0190235 100644
--- a/src/controllers/PdfController.ts
+++ b/src/controllers/PdfController.ts
@@ -3,6 +3,11 @@ import { OpenAPI } from 'routing-controllers-openapi';
 import { Runner } from '../models/Runner';
 import { PdfCreator } from '../PdfCreator';
 
+/**
+ * The pdf controller handels all endpoints concerning pdf generation.
+ * It therefore is the hearth of the document-generation server's endpoints.
+ * All endpoints have to accept a locale query-param to support i18n. 
+ */
 @JsonController()
 export class PdfController {
     private pdf: PdfCreator;
@@ -11,10 +16,10 @@ export class PdfController {
     }
 
     @Post('/contracts')
-    @OpenAPI({ description: "Generate Sponsoring contract pdfs from runner objects." })
+    @OpenAPI({ description: "Generate Sponsoring contract pdfs from runner objects.<br>You can choose your prefered locale by passing the 'locale' query-param." })
     async generateContracts(@Body({ validate: true }) runners: Runner | Runner[], @Res() res: any, @QueryParam("locale") locale: string) {
         if (!Array.isArray(runners)) {
-            runners = [runners]
+            runners = [runners];
         }
         const contracts = await this.pdf.generateSponsoringContract(runners, locale);
         res.setHeader('content-type', 'application/pdf');
diff --git a/src/controllers/StatusController.ts b/src/controllers/StatusController.ts
index f27c1f9..9578169 100644
--- a/src/controllers/StatusController.ts
+++ b/src/controllers/StatusController.ts
@@ -2,6 +2,9 @@ import { Get, JsonController } from 'routing-controllers';
 import { OpenAPI } from 'routing-controllers-openapi';
 import { config } from '../config';
 
+/**
+ * The statuscontroller provides simple endpoints concerning basic information about the server.
+ */
 @JsonController()
 export class StatusController {
     @Get('/version')