diff --git a/src/main/java/org/eolang/jeo/Representation.java b/src/main/java/org/eolang/jeo/Representation.java
index a7c2639e2..3bb7b7db4 100644
--- a/src/main/java/org/eolang/jeo/Representation.java
+++ b/src/main/java/org/eolang/jeo/Representation.java
@@ -50,11 +50,22 @@ public interface Representation {
      */
     byte[] toBytecode();
 
-
+    /**
+     * Named representation.
+     *
+     * @since 0.1.0
+     */
     class Named implements Representation {
 
+        /**
+         * Name of representation.
+         */
         private final String name;
 
+        /**
+         * Constructor.
+         * @param name Name of representation.
+         */
         public Named(final String name) {
             this.name = name;
         }
diff --git a/src/main/java/org/eolang/jeo/improvement/ImprovementLogged.java b/src/main/java/org/eolang/jeo/improvement/ImprovementLogged.java
index 3d9ed3b1b..d483c70ad 100644
--- a/src/main/java/org/eolang/jeo/improvement/ImprovementLogged.java
+++ b/src/main/java/org/eolang/jeo/improvement/ImprovementLogged.java
@@ -43,14 +43,16 @@ public final class ImprovementLogged implements Improvement {
 
     /**
      * Constructor.
+     * @since 0.1.0
      */
     public ImprovementLogged() {
-        this((msg) -> Logger.info(ImprovementLogged.class, msg));
+        this(msg -> Logger.info(ImprovementLogged.class, msg));
     }
 
     /**
      * Constructor.
      * @param logger Logger.
+     * @since 0.1.0
      */
     ImprovementLogged(final Consumer<String> logger) {
         this.logger = logger;
diff --git a/src/test/java/org/eolang/jeo/improvement/ImprovementLoggedTest.java b/src/test/java/org/eolang/jeo/improvement/ImprovementLoggedTest.java
index 407705553..943774da2 100644
--- a/src/test/java/org/eolang/jeo/improvement/ImprovementLoggedTest.java
+++ b/src/test/java/org/eolang/jeo/improvement/ImprovementLoggedTest.java
@@ -58,5 +58,4 @@ void printsInformationAboutRepresentation() {
             Matchers.containsString(expected)
         );
     }
-
-}
\ No newline at end of file
+}