diff --git a/pom.xml b/pom.xml
index 112efd5..8fa7b64 100644
--- a/pom.xml
+++ b/pom.xml
@@ -31,7 +31,7 @@
 
     <groupId>io.github.elf4j</groupId>
     <artifactId>jpl-elf4j</artifactId>
-    <version>8.1.0</version>
+    <version>8.2.0</version>
     <packaging>jar</packaging>
     <name>jpl-elf4j</name>
     <description>Native logging service provider implementation of ELF4J (Easy Logging Facade For Java)
@@ -68,7 +68,7 @@
         <dependency>
             <groupId>io.github.elf4j</groupId>
             <artifactId>elf4j-engine</artifactId>
-            <version>15.1.2</version>
+            <version>15.2.0</version>
         </dependency>
         <dependency>
             <groupId>org.junit.jupiter</groupId>
@@ -188,7 +188,7 @@
                 <configuration>
                     <java>
                         <palantirJavaFormat>
-                            <version>2.40.0</version>                     <!-- optional -->
+                            <version>2.43.0</version>
                             <style>PALANTIR</style>                       <!-- or AOSP/GOOGLE (optional) -->
                             <formatJavadoc>true
                             </formatJavadoc>          <!-- defaults to false (optional, requires at least Palantir 2.39.0) -->
diff --git a/src/main/java/elf4j/engine/jpl/Elf4jLogger.java b/src/main/java/elf4j/engine/jpl/Elf4jLogger.java
index ebc9ed5..29bc784 100644
--- a/src/main/java/elf4j/engine/jpl/Elf4jLogger.java
+++ b/src/main/java/elf4j/engine/jpl/Elf4jLogger.java
@@ -5,16 +5,17 @@
 import java.util.Objects;
 import java.util.ResourceBundle;
 import java.util.function.Supplier;
+import lombok.NonNull;
 import lombok.Value;
 
-/** */
+/** A Java 9 Logger implemented via elf4j-engine */
 @Value
 public class Elf4jLogger implements System.Logger {
     private static final Class<?> SERVICE_INTERFACE_CLASS = Elf4jLogger.class;
     String name;
     NativeLogger nativeLogger;
 
-    private static elf4j.Level translate(Level level) {
+    private static elf4j.Level translate(@NonNull Level level) {
         switch (level) {
             case INFO:
                 return elf4j.Level.INFO;
diff --git a/src/main/java/elf4j/engine/jpl/Elf4jLoggerFinder.java b/src/main/java/elf4j/engine/jpl/Elf4jLoggerFinder.java
index 3fc92ea..6ce95ba 100644
--- a/src/main/java/elf4j/engine/jpl/Elf4jLoggerFinder.java
+++ b/src/main/java/elf4j/engine/jpl/Elf4jLoggerFinder.java
@@ -4,13 +4,13 @@
 import java.util.HashMap;
 import java.util.Map;
 
-/** */
+/** Finds a Java 9 Logger implemented via elf4j-engine */
 public class Elf4jLoggerFinder extends System.LoggerFinder {
     private static final Class<System> SERVICE_ACCESS_CLASS = System.class;
     private final NativeLogServiceProvider nativeLogServiceProvider;
     private final Map<String, Elf4jLogger> elf4jLoggers = new HashMap<>();
 
-    /** Default constructor required by {@link java.util.ServiceLoader} */
+    /** A default constructor required by {@link java.util.ServiceLoader} */
     public Elf4jLoggerFinder() {
         this(new NativeLogServiceProvider(SERVICE_ACCESS_CLASS));
     }