Improve general code quality

src/main/java/at/pcgamingfreaks/mkvaudiosubtitlechanger/model/AttributeConfig.java

@@ -1,25 +1,21 @@
 package at.pcgamingfreaks.mkvaudiosubtitlechanger.model;
 
+import lombok.AllArgsConstructor;
 import lombok.Getter;
 import lombok.extern.log4j.Log4j2;
 
 @Log4j2
 @Getter
+@AllArgsConstructor
 public class AttributeConfig {
     private final String audioLanguage;
     private final String subtitleLanguage;
 
-    public AttributeConfig(String audioLanguage, String subtitleLanguage) {
-        this.audioLanguage = audioLanguage;
-        this.subtitleLanguage = subtitleLanguage;
-    }
-
     @Override
     public String toString() {
-        final StringBuffer sb = new StringBuffer("AttributeConfig{");
-        sb.append("audioLanguage='").append(audioLanguage).append('\'');
-        sb.append(", subtitleLanguage='").append(subtitleLanguage).append('\'');
-        sb.append('}');
-        return sb.toString();
+        return "AttributeConfig{"
+                + "audioLanguage='" + audioLanguage + '\''
+                + ", subtitleLanguage='" + subtitleLanguage + '\'' +
+                '}';
     }
 }