[bugzilla 413929] External parsers - step 1

Integration of Melanie Bats work with some minor changes (checkstyle
activation & fixes, poms)

Signed-off-by: Melanie Bats <melanie.bats@obeo.fr>
diff --git a/plugins/org.eclipse.mylyn.docs.intent.external.parser/.checkstyle b/plugins/org.eclipse.mylyn.docs.intent.external.parser/.checkstyle
new file mode 100644
index 0000000..959808a
--- /dev/null
+++ b/plugins/org.eclipse.mylyn.docs.intent.external.parser/.checkstyle
@@ -0,0 +1,7 @@
+<?xml version="1.0" encoding="UTF-8"?>
+
+<fileset-config file-format-version="1.2.0" simple-config="true" sync-formatter="false">
+  <fileset name="all" enabled="true" check-config-name="intent" local="false">
+    <file-match-pattern match-pattern="." include-pattern="true"/>
+  </fileset>
+</fileset-config>