diff --git a/config/README b/config/README
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+# Sample config files
+
+There are two sample config files here:
+
+* [aws-credentials.sample](./aws-credentials.sample): sample aws credentials file. It is same with aws credentials config file in official
+* [charon.yaml.sample](./charon.yaml.sample): sample charon config file. You can put it into $HOME/.charon/charon.yaml and change the content by your requirements.
diff --git a/config/aws-credentials b/config/aws-credentials.sample
similarity index 100%
rename from config/aws-credentials
rename to config/aws-credentials.sample
diff --git a/config/charon.yaml b/config/charon.yaml.sample
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rename from config/charon.yaml
rename to config/charon.yaml.sample
diff --git a/template/README b/template/README
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+# Sample template files to generate metadata
+
+These template files are used to generate related metadata accordingly. You can change based on the sample templates and then put them into $HOME/.charon/template/ to replace the default templates which are defined in charon sources.
diff --git a/template/archetype-catalog.xml.j2 b/template/archetype-catalog.xml.j2.sample
similarity index 100%
rename from template/archetype-catalog.xml.j2
rename to template/archetype-catalog.xml.j2.sample
diff --git a/template/index.html.j2 b/template/index.html.j2.sample
similarity index 100%
rename from template/index.html.j2
rename to template/index.html.j2.sample
diff --git a/template/maven-metadata.xml.j2 b/template/maven-metadata.xml.j2.sample
similarity index 100%
rename from template/maven-metadata.xml.j2
rename to template/maven-metadata.xml.j2.sample