diff --git a/.gitattributes b/.gitattributes
new file mode 100644
index 00000000..51e64837
--- /dev/null
+++ b/.gitattributes
@@ -0,0 +1 @@
+configdoc/usage.xml -crlf
diff --git a/.gitignore b/.gitignore
new file mode 100644
index 00000000..d48243ef
--- /dev/null
+++ b/.gitignore
@@ -0,0 +1,9 @@
+conf/
+library/HTMLPurifier/DefinitionCache/Serializer/*/
+library/standalone/
+library/HTMLPurifier.standalone.php
+*.phpt.diff
+*.phpt.exp
+*.phpt.log
+*.phpt.out
+*.phpt.php
diff --git a/library/HTMLPurifier/DefinitionCache/README b/library/HTMLPurifier/DefinitionCache/README
new file mode 100644
index 00000000..962b80a3
--- /dev/null
+++ b/library/HTMLPurifier/DefinitionCache/README
@@ -0,0 +1 @@
+This is a dummy file to prevent Git from ignoring this empty directory.
diff --git a/tests/HTMLPurifier/DefinitionCache/SerializerTest/README b/tests/HTMLPurifier/DefinitionCache/SerializerTest/README
new file mode 100644
index 00000000..962b80a3
--- /dev/null
+++ b/tests/HTMLPurifier/DefinitionCache/SerializerTest/README
@@ -0,0 +1 @@
+This is a dummy file to prevent Git from ignoring this empty directory.
diff --git a/tests/tmp/README b/tests/tmp/README
new file mode 100644
index 00000000..962b80a3
--- /dev/null
+++ b/tests/tmp/README
@@ -0,0 +1 @@
+This is a dummy file to prevent Git from ignoring this empty directory.