diff --git a/src/main/java/com/javatoavalla/stepfunction/impl/package-info.java b/src/main/java/com/javatoavalla/stepfunction/impl/package-info.java
new file mode 100644
index 0000000..8a026aa
--- /dev/null
+++ b/src/main/java/com/javatoavalla/stepfunction/impl/package-info.java
@@ -0,0 +1,5 @@
+/**
+ * This package contains the implementation classes of the interfaces in the
+ * {@link com.javatoavalla.stepfunction} package.
+ */
+package com.javatoavalla.stepfunction.impl;
\ No newline at end of file