diff --git a/etc/openapi.yaml b/etc/openapi.yaml
index ecd4c605..105dea1a 100644
--- a/etc/openapi.yaml
+++ b/etc/openapi.yaml
@@ -256,6 +256,26 @@ paths:
           description: OK
 components:
   schemas:
+    Action:
+      description: Executable action
+      enum:
+      - SUBSCRIBE
+      - UNSUBSCRIBE
+      type: string
+    Command:
+      description: Action to execute for a share
+      required:
+      - action
+      - key
+      type: object
+      properties:
+        action:
+          $ref: '#/components/schemas/Action'
+        key:
+          description: the share
+          type: string
+      xml:
+        name: command
     error:
       description: Structured error message
       type: object
diff --git a/src/main/java/x1/stomp/boundary/OpenAPIModelBuilder.java b/src/main/java/x1/stomp/boundary/OpenAPIModelBuilder.java
index 9bd38bcd..640d45d3 100644
--- a/src/main/java/x1/stomp/boundary/OpenAPIModelBuilder.java
+++ b/src/main/java/x1/stomp/boundary/OpenAPIModelBuilder.java
@@ -45,14 +45,12 @@ public OpenAPI buildModel() {
 
     try {
       LOCK.await();
+      // add server by a relative url: works only if using swagger UI deployed with the application
+      var server = OASFactory.createServer().description("stage").url(servletContext.getContextPath());
+      openAPI.addServer(server);
     } catch (InterruptedException e1) {
-      return openAPI;
+      // ignore
     }
-
-    // add server by a relative url: works only if using swagger UI deployed with
-    // the application
-    var server = OASFactory.createServer().description("stage").url(servletContext.getContextPath());
-    openAPI.addServer(server);
     return openAPI;
   }
 
diff --git a/src/test/java/x1/stomp/test/SchemaExportTest.java b/src/test/java/x1/stomp/test/SchemaExportTest.java
index 102dc585..ae37e600 100644
--- a/src/test/java/x1/stomp/test/SchemaExportTest.java
+++ b/src/test/java/x1/stomp/test/SchemaExportTest.java
@@ -18,7 +18,7 @@ public void testSchemaExport() {
     MetadataSources metadata = new MetadataSources(
         new StandardServiceRegistryBuilder().applySetting(AvailableSettings.DIALECT, PostgreSQLDialect.class.getName())
             .applySetting(AvailableSettings.DEFAULT_SCHEMA, "stocks").build());
-    new SchemaExport().setOutputFile("target/ddl.sql").setFormat(true).create(EnumSet.of(TargetType.SCRIPT),
+    new SchemaExport().setOutputFile("target/generated/ddl.sql").setFormat(true).create(EnumSet.of(TargetType.SCRIPT),
         metadata.addAnnotatedClass(Share.class).buildMetadata());
   }
 }