Ensure CRLF stays out of the repo

Looks like I already failed that project a little :)

(cherry picked from commit 066771b2d15748edc72095b75c4626bf445266aa)

.git-blame-ignore-revs

@@ -0,0 +1,4 @@
+# CRLF -> LF
+59ccc0a5af93d4b3d97df2bd6b946bba5a6d5c5c
+# Checkstyle
+eb52afa296fffc4397e2f4014c7eb8094f50240e

.gitattributes

@@ -1,2 +1,34 @@
-*.java   diff=java
-#*.java merge=import-driver #TODO not implemented, I'm just using a merge tool instead
+* text=auto
+# Force Batch files to CRLF
+*.bat text=crlf
+
+# Java sources
+*.java          text diff=java
+*.kt            text diff=java
+*.gradle        text diff=java
+*.gradle.kts    text diff=java
+
+# These files are text and should be normalized (Convert crlf => lf)
+*.css           text diff=css
+*.df            text
+*.htm           text diff=html
+*.html          text diff=html
+*.js            text
+*.jsp           text
+*.jspf          text
+*.jspx          text
+*.properties    text
+*.tld           text
+*.tag           text
+*.tagx          text
+*.xml           text
+
+# These files are binary and should be left untouched
+# (binary is a macro for -text -diff)
+*.class         binary
+*.dll           binary
+*.ear           binary
+*.jar           binary
+*.so            binary
+*.war           binary
+*.jks           binary

config/checkstyle/checkstyle.xml

@@ -96,7 +96,7 @@ Checks based on Google Checks, modified for EngineHub.
                      value="Member name ''{0}'' must match pattern ''{1}''."/>
         </module>
         <module name="ParameterName">
-            <property name="format" value="^([a-z][_a-zA-Z0-9]*|[a-z])$"/>
+            <property name="format" value="^([a-z][a-z0-9][_a-zA-Z0-9]*|[a-z])$"/>
             <message key="name.invalidPattern"
                      value="Parameter name ''{0}'' must match pattern ''{1}''."/>
         </module>
@@ -195,6 +195,10 @@ Checks based on Google Checks, modified for EngineHub.
     <module name="RegexpMultiline">
         <property name="format" value="^( +)@(Arg|Switch|Command)\(.*?\r?\n\1 {5,}"/>
     </module>
+    <module name="RegexpMultiline">
+        <property name="format" value="(?s:(\r\n|\r).*)"/>
+        <property name="message" value="CRLF and CR line endings are prohibited, but this file uses them."/>
+    </module>
     <module name="SuppressionFilter">
         <property name="file" value="${config_loc}/checkstyle-suppression.xml"/>
     </module>