diff --git a/builder/pom.xml b/builder/pom.xml
index 6d40d2f..b65ab86 100644
--- a/builder/pom.xml
+++ b/builder/pom.xml
@@ -25,7 +25,7 @@
         <checkstyle.version>7.3</checkstyle.version>
         <sevntu-checkstyle-maven-plugin.version>1.22.0</sevntu-checkstyle-maven-plugin.version>
         <kemitix-checkstyle-ruleset.version>2.0.0-SNAPSHOT</kemitix-checkstyle-ruleset.version>
-        <kemitix-checkstyle-ruleset.level>1-layout</kemitix-checkstyle-ruleset.level>
+        <kemitix-checkstyle-ruleset.level>2-naming</kemitix-checkstyle-ruleset.level>
     </properties>
 
     <dependencyManagement>
diff --git a/builder/src/main/java/net/kemitix/checkstyle/ruleset/builder/CheckstyleWriter.java b/builder/src/main/java/net/kemitix/checkstyle/ruleset/builder/CheckstyleWriter.java
index 014c044..4aab95f 100644
--- a/builder/src/main/java/net/kemitix/checkstyle/ruleset/builder/CheckstyleWriter.java
+++ b/builder/src/main/java/net/kemitix/checkstyle/ruleset/builder/CheckstyleWriter.java
@@ -49,6 +49,8 @@ import java.util.stream.Stream;
 @RequiredArgsConstructor
 class CheckstyleWriter implements CommandLineRunner {
 
+    private static final String NEWLINE = "\n";
+
     private final OutputProperties outputProperties;
 
     private final TemplateProperties templateProperties;
@@ -72,14 +74,14 @@ class CheckstyleWriter implements CommandLineRunner {
                                           .filter(rule -> RuleParent.CHECKER.equals(rule.getParent()))
                                           .filter(rule -> ruleLevel.compareTo(rule.getLevel()) >= 0)
                                           .map(this::formatRuleAsModule)
-                                          .collect(Collectors.joining("\n"));
+                                          .collect(Collectors.joining(NEWLINE));
         val treeWalkerRules = rulesProperties.getRules()
                                              .stream()
                                              .filter(Rule::isEnabled)
                                              .filter(rule -> RuleParent.TREEWALKER.equals(rule.getParent()))
                                              .filter(rule -> ruleLevel.compareTo(rule.getLevel()) >= 0)
                                              .map(this::formatRuleAsModule)
-                                             .collect(Collectors.joining("\n"));
+                                             .collect(Collectors.joining(NEWLINE));
 
 
         try {
@@ -91,7 +93,7 @@ class CheckstyleWriter implements CommandLineRunner {
             val bytes = Files.readAllBytes(checkstyleXmlTemplate);
             val template = new String(bytes);
             val output = Arrays.asList(String.format(template, checkerRules, treeWalkerRules)
-                                             .split("\n"));
+                                             .split(NEWLINE));
             Files.write(xmlFile, output, StandardCharsets.UTF_8, StandardOpenOption.TRUNCATE_EXISTING);
         } catch (IOException e) {
             throw new RuntimeException(e);
@@ -111,6 +113,6 @@ class CheckstyleWriter implements CommandLineRunner {
     private String formatProperties(final Map<String, String> properties) {
         return MapStream.of(properties)
                         .map((k, v) -> String.format("<property name=\"%s\" value=\"%s\"/>", k, v))
-                        .collect(Collectors.joining("\n"));
+                        .collect(Collectors.joining(NEWLINE));
     }
 }