diff --git a/releasenotes-builder/src/main/java/com/github/checkstyle/Main.java b/releasenotes-builder/src/main/java/com/github/checkstyle/Main.java
index 42f3e33c..710f76f9 100644
--- a/releasenotes-builder/src/main/java/com/github/checkstyle/Main.java
+++ b/releasenotes-builder/src/main/java/com/github/checkstyle/Main.java
@@ -47,8 +47,9 @@ private Main() {
      * Entry point.
      *
      * @param args command line arguments.
-     * @noinspection UseOfSystemOutOrSystemErr
+     * @noinspection UseOfSystemOutOrSystemErr, CallToSystemExit
      * @noinspectionreason UseOfSystemOutOrSystemErr - used for CLI output
+     * @noinspectionreason CallToSystemExit - main method must exit with code
      */
     public static void main(String... args) {
         int errorCounter;
@@ -77,17 +78,17 @@ public static void main(String... args) {
         }
         if (errorCounter == 0) {
             if (publicationErrors != null && !publicationErrors.isEmpty()) {
-                System.out.println(String.format("%nPublication ends with %d errors:",
-                        publicationErrors.size()));
+                System.out.printf("%nPublication ends with %d errors:%n",
+                                  publicationErrors.size());
                 printListOf(publicationErrors);
             }
             else {
-                System.out.println(String.format("%nExecution succeeded!"));
+                System.out.printf("%nExecution succeeded!%n");
             }
         }
         else {
-            System.out.println(String.format("%nGeneration ends with %d errors.",
-                errorCounter));
+            System.out.printf("%nGeneration ends with %d errors.%n",
+                              errorCounter);
             System.exit(ERROR_EXIT_CODE);
         }
     }
diff --git a/releasenotes-builder/src/test/java/com/github/checkstyle/templates/TemplateProcessorTest.java b/releasenotes-builder/src/test/java/com/github/checkstyle/templates/TemplateProcessorTest.java
index 1bf8ccfa..37cfa66e 100644
--- a/releasenotes-builder/src/test/java/com/github/checkstyle/templates/TemplateProcessorTest.java
+++ b/releasenotes-builder/src/test/java/com/github/checkstyle/templates/TemplateProcessorTest.java
@@ -336,7 +336,7 @@ private void assertFile(String actualName) {
     }
 
     private static String getFileContents(File file) throws IOException {
-        final StringBuilder result = new StringBuilder();
+        final StringBuilder result = new StringBuilder(256);
 
         try (BufferedReader br = Files.newBufferedReader(file.toPath())) {
             do {