Add generated files and folders to .gitignore

Change-Id: I794c9a96a3f4011dd84a8d6ce10545c867f78a0b
diff --git a/.gitignore b/.gitignore
index e71333d..9793465 100644
--- a/.gitignore
+++ b/.gitignore
@@ -1,3 +1,7 @@
+.classpath
+.project
+/.settings/org.maven.ide.eclipse.prefs
+/.settings/org.eclipse.m2e.core.prefs
 .idea
 target/
 hooks-jira.iml