diff --git a/src/main/java/com/devonfw/sample/archunit/violation/CaptialViolation/P3CapitalViolation.java b/src/main/java/com/devonfw/sample/archunit/violation/CaptialViolation/P3CapitalViolation.java
new file mode 100644
index 0000000..cec55e0
--- /dev/null
+++ b/src/main/java/com/devonfw/sample/archunit/violation/CaptialViolation/P3CapitalViolation.java
@@ -0,0 +1,5 @@
+package com.devonfw.sample.archunit.violation.CaptialViolation;
+
+public class P3CapitalViolation {
+    // No layer have capital letters in its name.
+}
\ No newline at end of file
diff --git a/src/main/java/com/devonfw/sample/archunit/violation/P1NoLayer.java b/src/main/java/com/devonfw/sample/archunit/violation/P1NoLayer.java
new file mode 100644
index 0000000..2a3168e
--- /dev/null
+++ b/src/main/java/com/devonfw/sample/archunit/violation/P1NoLayer.java
@@ -0,0 +1,5 @@
+package com.devonfw.sample.archunit.violation;
+
+public class P1NoLayer {
+    // no class should be without a Layer
+}
\ No newline at end of file
diff --git a/src/main/java/com/devonfw/sample/archunit/violation/violationlayer/P2ViolationLayer.java b/src/main/java/com/devonfw/sample/archunit/violation/violationlayer/P2ViolationLayer.java
new file mode 100644
index 0000000..fc2d3e7
--- /dev/null
+++ b/src/main/java/com/devonfw/sample/archunit/violation/violationlayer/P2ViolationLayer.java
@@ -0,0 +1,5 @@
+package com.devonfw.sample.archunit.violation.violationlayer;
+
+public class P2ViolationLayer {
+    // No layer should have the name violation, resulting in the error for this class.
+}
\ No newline at end of file