diff --git a/config/checkstyle/checkstyle.xml b/config/checkstyle/checkstyle.xml
new file mode 100644
index 0000000..cbe6e3b
--- /dev/null
+++ b/config/checkstyle/checkstyle.xml
@@ -0,0 +1,264 @@
+<?xml version="1.0"?>
+<!DOCTYPE module PUBLIC
+          "-//Puppy Crawl//DTD Check Configuration 1.3//EN"
+          "http://www.puppycrawl.com/dtds/configuration_1_3.dtd">
+
+<!--
+
+  Checkstyle configuration that checks the sun coding conventions from:
+
+    - the Java Language Specification at
+      http://java.sun.com/docs/books/jls/second_edition/html/index.html
+
+    - the Sun Code Conventions at http://java.sun.com/docs/codeconv/
+
+    - the Javadoc guidelines at
+      http://java.sun.com/j2se/javadoc/writingdoccomments/index.html
+
+    - the JDK Api documentation http://java.sun.com/j2se/docs/api/index.html
+
+    - some best practices
+
+  Checkstyle is very configurable. Be sure to read the documentation at
+  http://checkstyle.sf.net (or in your downloaded distribution).
+
+  Most Checks are configurable, be sure to consult the documentation.
+
+  To completely disable a check, just comment it out or delete it from the file.
+
+  Finally, it is worth reading the documentation.
+
+-->
+
+<module name="Checker">
+    <!--
+        If you set the basedir property below, then all reported file
+        names will be relative to the specified directory. See
+        http://checkstyle.sourceforge.net/5.x/config.html#Checker
+
+        <property name="basedir" value="${basedir}"/>
+    -->
+
+    <property name="fileExtensions" value="java, properties, xml"/>
+     <!-- Excludes all 'module-info.java' files              -->
+    <!-- See https://checkstyle.org/config_filefilters.html -->
+    <module name="BeforeExecutionExclusionFileFilter">
+        <property name="fileNamePattern" value="module\-info\.java$"/>
+    </module>
+
+    <property name="severity" value="error"/>
+
+    <module name="SuppressionFilter">
+        <property name="file" value="${config_loc}/suppressions.xml"/>
+    </module>
+
+    <!-- Checks for Size Violations.                    -->
+    <!-- See https://checkstyle.org/checks/sizes/index.html -->
+    <module name="FileLength"/>
+
+    <!-- See docs_devel/docs/30.CodingStyles.md -->
+    <module name="LineLength">
+        <property name="severity" value="warning"/>
+        <property name="max" value="120"/>
+        <property name="ignorePattern" value="^ *\* *[^ ]+$"/>
+    </module>
+
+    <!-- Checks that a package-info.java file exists for each package.     -->
+    <!-- See http://checkstyle.sf.net/config_javadoc.html#JavadocPackage -->
+    <module name="JavadocPackage">
+        <property name="severity" value="ignore"/>
+    </module>
+
+    <!-- Checks whether files end with a new line.                        -->
+    <!-- See http://checkstyle.sf.net/config_misc.html#NewlineAtEndOfFile -->
+    <module name="NewlineAtEndOfFile"/>
+
+    <!-- Checks that property files contain the same keys.         -->
+    <!-- https://checkstyle.org/checks/misc/translation.html#Translation -->
+    <module name="Translation">
+        <property name="baseName" value="^Bundle.*"/>
+    </module>
+
+    <!-- Checks for whitespace                               -->
+    <!-- See https://checkstyle.org/checks/whitespace/index.html -->
+    <module name="FileTabCharacter">
+        <property name="severity" value="error"/>
+    </module>
+
+    <!-- Whitespace in a single line comment end -->
+    <!-- See https://checkstyle.org/checks/regexp/regexpsingleline.html#RegexpSingleline -->
+    <module name="RegexpSingleline">
+       <property name="format" value="(?&lt;!\\)(?:\\{2}).*\s+$"/>
+       <property name="minimum" value="0"/>
+       <property name="maximum" value="0"/>
+       <property name="message" value="Line has trailing spaces."/>
+    </module>
+
+    <module name="TreeWalker">
+
+        <!-- Support default CHECKSTYLE:ON/OFF comments -->
+        <module name="SuppressionCommentFilter">
+            <property name="offCommentFormat" value="CHECKSTYLE:OFF"/>
+            <property name="onCommentFormat" value="CHECKSTYLE:ON"/>
+        </module>
+        <!-- Support CHECKSTYLE.ON/OFF: <RULE> comments -->
+        <module name="SuppressionCommentFilter">
+            <property name="offCommentFormat" value="CHECKSTYLE.OFF\: ([\w\|]+)"/>
+            <property name="onCommentFormat" value="CHECKSTYLE.ON\: ([\w\|]+)"/>
+            <property name="checkFormat" value="$1"/>
+        </module>
+
+        <!-- Suppression on generated codes -->
+        <module name="SuppressionCommentFilter">
+            <property name="offCommentFormat" value="GEN-FIRST:.*"/>
+            <property name="onCommentFormat" value="GEN-LAST:.*"/>
+        </module>
+        <module name="SuppressionCommentFilter">
+            <property name="offCommentFormat" value="^.*//GEN-BEGIN:.*"/>
+            <property name="onCommentFormat" value="^.*//GEN-END:.*"/>
+        </module>
+
+        <!-- Checks for Javadoc comments.                     -->
+        <!-- See http://checkstyle.sf.net/config_javadoc.html -->
+        <module name="JavadocMethod">
+            <property name="severity" value="ignore"/>
+        </module>
+        <module name="JavadocType">
+            <property name="severity" value="ignore"/>
+        </module>
+        <module name="JavadocVariable">
+            <property name="severity" value="ignore"/>
+        </module>
+        <module name="JavadocStyle">
+            <property name="severity" value="ignore"/>
+        </module>
+
+        <!-- Checks for Naming Conventions.                  -->
+        <!-- See http://checkstyle.sf.net/config_naming.html -->
+        <module name="ConstantName">
+            <property name="severity" value="warning"/>
+        </module>
+        <module name="LocalFinalVariableName"/>
+        <module name="LocalVariableName"/>
+        <module name="MemberName">
+            <property name="severity" value="warning"/>
+        </module>
+        <module name="MethodName"/>
+        <module name="PackageName"/>
+        <module name="ParameterName"/>
+        <module name="StaticVariableName"/>
+        <module name="TypeName">
+            <property name="severity" value="warning"/>
+        </module>
+
+        <!-- Checks for imports                              -->
+        <!-- See http://checkstyle.sf.net/config_import.html -->
+        <module name="AvoidStarImport"/>
+        <module name="IllegalImport"/> <!-- defaults to sun.* packages -->
+        <module name="RedundantImport"/>
+        <module name="UnusedImports">
+            <property name="processJavadoc" value="true"/>
+        </module>
+
+        <!-- Checks for Size Violations.                    -->
+        <!-- See http://checkstyle.sf.net/config_sizes.html -->
+
+        <module name="MethodLength"/>
+        <module name="ParameterNumber"/>
+
+        <!-- Checks for whitespace                               -->
+        <!-- See http://checkstyle.sf.net/config_whitespace.html -->
+        <module name="EmptyForIteratorPad"/>
+        <module name="GenericWhitespace"/>
+        <module name="MethodParamPad"/>
+        <module name="NoWhitespaceAfter">
+            <property name="tokens" value="BNOT"/>
+            <property name="tokens" value="DEC"/>
+            <property name="tokens" value="DOT"/>
+            <property name="tokens" value="INC"/>
+            <property name="tokens" value="LNOT"/>
+            <property name="tokens" value="UNARY_MINUS"/>
+            <property name="tokens" value="UNARY_PLUS"/>
+            <property name="tokens" value="ARRAY_DECLARATOR"/>
+            <property name="tokens" value="INDEX_OP"/>
+        </module>
+        <module name="NoWhitespaceBefore"/>
+        <module name="OperatorWrap">
+            <property name="severity" value="warning"/>
+        </module>
+        <module name="ParenPad"/>
+        <module name="TypecastParenPad">
+            <property name="severity" value="error"/>
+        </module>
+        <module name="WhitespaceAfter"/>
+        <module name="WhitespaceAround">
+            <property name="allowEmptyConstructors" value="true"/>
+            <property name="allowEmptyMethods" value="true"/>
+            <property name="severity" value="error"/>
+        </module>
+
+        <!-- Modifier Checks                                    -->
+        <!-- See http://checkstyle.sf.net/config_modifiers.html -->
+        <module name="ModifierOrder">
+            <property name="severity" value="error"/>
+        </module>
+        <module name="RedundantModifier">
+            <property name="severity" value="error"/>
+        </module>
+
+        <!-- Checks for blocks. You know, those {}'s         -->
+        <!-- See http://checkstyle.sf.net/config_blocks.html -->
+        <module name="AvoidNestedBlocks">
+            <property name="severity" value="warning"/>
+        </module>
+        <module name="EmptyBlock"/>
+        <module name="LeftCurly"/>
+        <module name="NeedBraces"/>
+        <module name="RightCurly"/>
+
+        <!-- Checks for common coding problems               -->
+        <!-- See http://checkstyle.sf.net/config_coding.html -->
+        <module name="AvoidInlineConditionals">
+            <property name="severity" value="ignore"/>
+        </module>
+        <module name="EmptyStatement"/>
+        <module name="EqualsHashCode"/>
+        <module name="HiddenField">
+            <property name="severity" value="warning"/>
+            <property name="ignoreConstructorParameter" value="true"/>
+            <property name="ignoreSetter" value="true"/>
+            <property name="setterCanReturnItsClass" value="true"/>
+        </module>
+        <module name="IllegalInstantiation"/>
+        <module name="InnerAssignment"/>
+        <module name="MagicNumber"/>
+        <module name="MissingSwitchDefault">
+            <property name="severity" value="warning"/>
+        </module>
+        <module name="SimplifyBooleanExpression"/>
+        <module name="SimplifyBooleanReturn"/>
+
+        <!-- Checks for class design                         -->
+        <!-- See http://checkstyle.sf.net/config_design.html -->
+        <module name="DesignForExtension"/>
+        <module name="FinalClass"/>
+        <module name="HideUtilityClassConstructor"/>
+        <module name="InterfaceIsType"/>
+        <module name="VisibilityModifier">
+            <property name="severity" value="ignore"/>
+        </module>
+
+        <!-- Miscellaneous other checks.                   -->
+        <!-- See http://checkstyle.sf.net/config_misc.html -->
+        <module name="ArrayTypeStyle"/>
+        <module name="FinalParameters">
+            <property name="severity" value="ignore"/>
+        </module>
+        <module name="TodoComment">
+            <property name="severity" value="warning"/>
+        </module>
+        <module name="UpperEll"/>
+
+    </module>
+
+</module>