diff --git a/generator/src/main/java/io/github/jwharm/javagi/model/Interface.java b/generator/src/main/java/io/github/jwharm/javagi/model/Interface.java
index e9f8f645..293153e4 100644
--- a/generator/src/main/java/io/github/jwharm/javagi/model/Interface.java
+++ b/generator/src/main/java/io/github/jwharm/javagi/model/Interface.java
@@ -50,9 +50,17 @@ public void generate(Writer writer) throws IOException {
 
     public void generateImplClass(Writer writer) throws IOException {
         writer.write("    \n");
+        writer.write("    /**\n");
+        writer.write("     * The " + javaName + "Impl type represents a native instance of the " + javaName + " interface.\n");
+        writer.write("     */\n");
         writer.write("    class " + javaName + "Impl extends org.gtk.gobject.GObject implements " + javaName + " {\n");
         generateEnsureInitialized(writer, "        ");
         writer.write("        \n");
+        writer.write("        /**\n");
+        writer.write("         * Creates a new instance of " + javaName + " for the provided memory address.\n");
+        writer.write("         * @param address the memory address of the instance\n");
+        writer.write("         * @param ownership the ownership indicator of the instance\n");
+        writer.write("         */\n");
         writer.write("        public " + javaName + "Impl(Addressable address, Ownership ownership) {\n");
         writer.write("            super(address, ownership);\n");
         writer.write("        }\n");
diff --git a/generator/src/main/java/io/github/jwharm/javagi/model/ValueWrapper.java b/generator/src/main/java/io/github/jwharm/javagi/model/ValueWrapper.java
index 36873d96..d9c4d854 100644
--- a/generator/src/main/java/io/github/jwharm/javagi/model/ValueWrapper.java
+++ b/generator/src/main/java/io/github/jwharm/javagi/model/ValueWrapper.java
@@ -12,6 +12,9 @@ public ValueWrapper(GirElement parent, String name, String parentClass, String c
     
     public void generateValueConstructor(Writer writer, String typeStr) throws IOException {
         writer.write("    \n");
+        writer.write("    /**\n");
+        writer.write("     * Create a new " + javaName + " with the provided value\n");
+        writer.write("     */\n");
         writer.write("    public " + javaName + "(" + typeStr + " value) {\n");
         writer.write("        super(value);\n");
         writer.write("    }\n");