Fix checkstyle errors

Signed-off-by: Gyúróczki Gergő <gergonoorbi@gmail.com>

src/main/java/org/eclipse/yasson/internal/model/JsonbAnnotatedElement.java

@@ -14,22 +14,21 @@
 
 import java.lang.annotation.Annotation;
 import java.lang.reflect.AnnotatedElement;
-
-import java.util.Map;
 import java.util.HashMap;
+import java.util.Map;
 
 import javax.json.bind.JsonbException;
 
-import org.eclipse.yasson.internal.properties.Messages;
 import org.eclipse.yasson.internal.properties.MessageKeys;
+import org.eclipse.yasson.internal.properties.Messages;
 
 /**
  * Annotation holder for fields, getters and setters.
  *
  * @param <T> annotated element
  */
 public class JsonbAnnotatedElement<T extends AnnotatedElement> {
-	
+
     private final Map<Class<? extends Annotation>, Annotation> annotations;
 
     private final T element;
@@ -59,7 +58,13 @@ public T getElement() {
         return element;
     }
 
-    public <T extends Annotation> T getAnnotation(Class<T> annotationClass) {
+    /**
+     * Get an annotation by type.
+     * @param <AT> Type of annotation
+     * @param annotationClass Type of annotation
+     * @return Annotation by passed type
+     */
+    public <AT extends Annotation> AT getAnnotation(Class<AT> annotationClass) {
         return annotationClass.cast(annotations.get(annotationClass));
     }