diff --git a/spring-modulith-events/spring-modulith-events-amqp/src/main/java/org/springframework/modulith/events/amqp/package-info.java b/spring-modulith-events/spring-modulith-events-amqp/src/main/java/org/springframework/modulith/events/amqp/package-info.java
new file mode 100644
index 00000000..cd2ad293
--- /dev/null
+++ b/spring-modulith-events/spring-modulith-events-amqp/src/main/java/org/springframework/modulith/events/amqp/package-info.java
@@ -0,0 +1,5 @@
+/**
+ * AMQP event externalization support.
+ */
+@org.springframework.lang.NonNullApi
+package org.springframework.modulith.events.amqp;
diff --git a/spring-modulith-events/spring-modulith-events-jms/src/main/java/org/springframework/modulith/events/jms/package-info.java b/spring-modulith-events/spring-modulith-events-jms/src/main/java/org/springframework/modulith/events/jms/package-info.java
new file mode 100644
index 00000000..5c446ada
--- /dev/null
+++ b/spring-modulith-events/spring-modulith-events-jms/src/main/java/org/springframework/modulith/events/jms/package-info.java
@@ -0,0 +1,5 @@
+/**
+ * JMS event externalization support.
+ */
+@org.springframework.lang.NonNullApi
+package org.springframework.modulith.events.jms;
diff --git a/spring-modulith-events/spring-modulith-events-kafka/src/main/java/org/springframework/modulith/events/kafka/package-info.java b/spring-modulith-events/spring-modulith-events-kafka/src/main/java/org/springframework/modulith/events/kafka/package-info.java
new file mode 100644
index 00000000..6e3bdde9
--- /dev/null
+++ b/spring-modulith-events/spring-modulith-events-kafka/src/main/java/org/springframework/modulith/events/kafka/package-info.java
@@ -0,0 +1,5 @@
+/**
+ * Kafka event externalization support.
+ */
+@org.springframework.lang.NonNullApi
+package org.springframework.modulith.events.kafka;