diff --git a/builder/src/main/java/net/kemitix/checkstyle/ruleset/builder/ReadmeFragmentNotFoundException.java b/builder/src/main/java/net/kemitix/checkstyle/ruleset/builder/ReadmeFragmentNotFoundException.java
new file mode 100644
index 0000000..de18387
--- /dev/null
+++ b/builder/src/main/java/net/kemitix/checkstyle/ruleset/builder/ReadmeFragmentNotFoundException.java
@@ -0,0 +1,43 @@
+/*
+The MIT License (MIT)
+
+Copyright (c) 2016 Paul Campbell
+
+Permission is hereby granted, free of charge, to any person obtaining a copy
+of this software and associated documentation files (the "Software"), to deal
+in the Software without restriction, including without limitation the rights
+to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+copies of the Software, and to permit persons to whom the Software is
+furnished to do so, subject to the following conditions:
+
+The above copyright notice and this permission notice shall be included in all
+copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+SOFTWARE.
+*/
+
+package net.kemitix.checkstyle.ruleset.builder;
+
+/**
+ * Exception raised when a README documentation fragment can't be found for a rule.
+ *
+ * @author Paul Campbell (pcampbell@kemitix.net)
+ */
+class ReadmeFragmentNotFoundException extends RuntimeException {
+
+    /**
+     * Constructor.
+     *
+     * @param ruleName The name of the Rule.
+     * @param cause    The cause.
+     */
+    ReadmeFragmentNotFoundException(final String ruleName, final Throwable cause) {
+        super(ruleName, cause);
+    }
+}
diff --git a/builder/src/test/java/net/kemitix/checkstyle/ruleset/builder/ReadmeFragmentNotFoundExceptionTest.java b/builder/src/test/java/net/kemitix/checkstyle/ruleset/builder/ReadmeFragmentNotFoundExceptionTest.java
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index 0000000..7abfda9
--- /dev/null
+++ b/builder/src/test/java/net/kemitix/checkstyle/ruleset/builder/ReadmeFragmentNotFoundExceptionTest.java
@@ -0,0 +1,30 @@
+package net.kemitix.checkstyle.ruleset.builder;
+
+import lombok.val;
+import org.junit.Test;
+
+import java.io.IOException;
+
+import static org.assertj.core.api.Assertions.assertThat;
+
+/**
+ * Tests for {@link ReadmeFragmentNotFoundException}.
+ *
+ * @author Paul Campbell (pcampbell@kemitix.net)
+ */
+public class ReadmeFragmentNotFoundExceptionTest {
+
+    @Test
+    public void shouldCreateExceptionWithName() {
+        //given
+        val name = "rule name";
+        val cause = new IOException();
+        //when
+        val exception = new ReadmeFragmentNotFoundException(name, cause);
+        //then
+        assertThat(exception.getMessage()).as("rule name is message")
+                                          .isEqualTo(name);
+        assertThat(exception.getCause()).as("cause is caught")
+                                        .isSameAs(cause);
+    }
+}