diff --git a/pom.xml b/pom.xml
index 246bc832..175c6b65 100644
--- a/pom.xml
+++ b/pom.xml
@@ -1,7 +1,7 @@
 <?xml version="1.0" encoding="UTF-8"?>
 <!--
 
-    Copyright 2005-2023 the original author or authors.
+    Copyright 2005-2024 the original author or authors.
 
     Licensed under the Apache License, Version 2.0 (the "License");
     you may not use this file except in compliance with the License.
diff --git a/src/main/groovy/org/codehaus/mojo/spotbugs/BaseViolationCheckMojo.groovy b/src/main/groovy/org/codehaus/mojo/spotbugs/BaseViolationCheckMojo.groovy
index e0c09221..58eae1f0 100644
--- a/src/main/groovy/org/codehaus/mojo/spotbugs/BaseViolationCheckMojo.groovy
+++ b/src/main/groovy/org/codehaus/mojo/spotbugs/BaseViolationCheckMojo.groovy
@@ -1,5 +1,5 @@
 /*
- * Copyright 2005-2023 the original author or authors.
+ * Copyright 2005-2024 the original author or authors.
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
@@ -17,6 +17,7 @@ package org.codehaus.mojo.spotbugs
 
 import groovy.xml.XmlParser
 import groovy.xml.XmlSlurper
+import org.apache.commons.io.FileUtils
 
 import org.apache.maven.artifact.repository.ArtifactRepository
 
@@ -40,7 +41,6 @@ import org.apache.maven.project.MavenProject
 import org.apache.maven.shared.transfer.artifact.resolve.ArtifactResolver
 
 import org.codehaus.plexus.resource.ResourceManager
-import org.codehaus.plexus.util.FileUtils
 
 abstract class BaseViolationCheckMojo extends AbstractMojo {
 
@@ -503,16 +503,19 @@ abstract class BaseViolationCheckMojo extends AbstractMojo {
     }
 
     private boolean doSourceFilesExist() {
-        List sourceFiles = new ArrayList()
+        Collection<File> sourceFiles = new ArrayList<>()
 
         if (this.classFilesDirectory.isDirectory()) {
-            sourceFiles.addAll(FileUtils.getFiles(classFilesDirectory, SpotBugsInfo.JAVA_REGEX_PATTERN, null))
+            log.debug("looking for class files with extensions: " + SpotBugsInfo.EXTENSIONS)
+            sourceFiles.addAll(FileUtils.listFiles(classFilesDirectory, SpotBugsInfo.EXTENSIONS, true))
         }
 
         if (this.includeTests && this.testClassFilesDirectory.isDirectory()) {
-            sourceFiles.addAll(FileUtils.getFiles(testClassFilesDirectory, SpotBugsInfo.JAVA_REGEX_PATTERN, null))
+            log.debug("looking for test class files: " + SpotBugsInfo.EXTENSIONS)
+            sourceFiles.addAll(FileUtils.listFiles(testClassFilesDirectory, SpotBugsInfo.EXTENSIONS, true))
         }
 
+        log.debug("SourceFiles: " + Arrays.toString(sourceFiles));
         !sourceFiles.isEmpty()
     }
 
diff --git a/src/main/groovy/org/codehaus/mojo/spotbugs/SpotBugsInfo.groovy b/src/main/groovy/org/codehaus/mojo/spotbugs/SpotBugsInfo.groovy
index ee90e441..10c353c4 100644
--- a/src/main/groovy/org/codehaus/mojo/spotbugs/SpotBugsInfo.groovy
+++ b/src/main/groovy/org/codehaus/mojo/spotbugs/SpotBugsInfo.groovy
@@ -1,5 +1,5 @@
 /*
- * Copyright 2005-2023 the original author or authors.
+ * Copyright 2005-2024 the original author or authors.
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
@@ -60,9 +60,9 @@ interface SpotBugsInfo {
     static final String JAVA_SOURCES_KEY = "report.spotbugs.javasources"
 
     /**
-     * The regex pattern to search for java class files.
+     * The extensions to search files for.
      */
-    static final String JAVA_REGEX_PATTERN = "**/*.class"
+    static final String[] EXTENSIONS = [ "class" ]
 
     static final String COMMA = ","