diff --git a/.idea/checkstyle-idea.xml b/.idea/checkstyle-idea.xml
index 02ee5c8..e856ef1 100644
--- a/.idea/checkstyle-idea.xml
+++ b/.idea/checkstyle-idea.xml
@@ -3,10 +3,12 @@
   <component name="CheckStyle-IDEA">
     <option name="configuration">
       <map>
+        <entry key="active-configuration" value="PROJECT_RELATIVE:$PROJECT_DIR$/requiredCheckstyleRules_Final_829.xml:Required" />
         <entry key="checkstyle-version" value="8.29" />
         <entry key="copy-libs" value="false" />
         <entry key="location-0" value="BUNDLED:(bundled):Sun Checks" />
         <entry key="location-1" value="BUNDLED:(bundled):Google Checks" />
+        <entry key="location-2" value="PROJECT_RELATIVE:$PROJECT_DIR$/requiredCheckstyleRules_Final_829.xml:Required" />
         <entry key="scan-before-checkin" value="false" />
         <entry key="scanscope" value="JavaOnly" />
         <entry key="suppress-errors" value="false" />
diff --git a/requiredCheckstyleRules_Final_829.xml b/requiredCheckstyleRules_Final_829.xml
new file mode 100644
index 0000000..b4d28f8
--- /dev/null
+++ b/requiredCheckstyleRules_Final_829.xml
@@ -0,0 +1,402 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<!DOCTYPE module PUBLIC "-//Puppy Crawl//DTD Check Configuration 1.1//EN" "http://www.puppycrawl.com/dtds/configuration_1_1.dtd">
+<module name="Checker">
+    <property name="severity" value="warning" />
+
+    <!-- ######## TEMPLATE/CHECKSTYLE/SIZE.XML ######## !-->
+    <!-- See http://yle.sourceforge.net/config_sizes.html#FileLength !-->
+    <!-- Checks for long files. !-->
+    <module name="FileLength">
+        <property name="max" value="500"/>
+        <property name="fileExtensions" value=""/>
+    </module>
+
+    <!-- See http://yle.sf.net/config_sizes.html !-->
+    <!-- Checks for long lines. !-->
+    <module name="LineLength">
+        <property name="ignorePattern" value="^$" />
+        <property name="max" value="120" />
+    </module>
+
+    <module name="TreeWalker">
+
+        <!-- Checks the number of methods declared in each type. This includes the number of each scope !-->
+        <!-- (private, package, protected and public) as well as an overall total. !-->
+        <!-- See http://yle.sourceforge.net/config_sizes.html#MethodCount !-->
+        <module name="MethodCount">
+            <property name="maxTotal" value="100"/>
+            <property name="maxPrivate" value="100"/>
+            <property name="maxPackage" value="100"/>
+            <property name="maxProtected" value="100"/>
+            <property name="maxPublic" value="100"/>
+        </module>
+
+        <!-- Checks for long methods and constructors. !-->
+        <!-- See http://yle.sf.net/config_sizes.html !-->
+        <module name="MethodLength">
+            <property name="max" value="80"/>
+            <property name="countEmpty" value="true"/>
+            <property name="tokens" value="METHOD_DEF, CTOR_DEF"/>
+        </module>
+
+        <!-- Checks for the number of types declared at the outer (or root) level in a file. !-->
+        <!-- See http://yle.sourceforge.net/config_sizes.html#OuterTypeNumber !-->
+        <module name="OuterTypeNumber">
+            <property name="max" value="1"/>
+        </module>
+
+        <!-- Checks the number of parameters of a method or constructor. !-->
+        <!-- See http://yle.sf.net/config_sizes.html !-->
+        <module name="ParameterNumber">
+            <property name="max" value="7"/>
+            <property name="tokens" value="METHOD_DEF, CTOR_DEF"/>
+        </module>
+
+    </module>
+    <!-- ######## END OF TEMPLATE/CHECKSTYLE/SIZE.XML ######## !-->
+
+    <!-- ######## TEMPLATE/CHECKSTYLE/WHITESPACE.XML ######## !-->
+    <module name="TreeWalker">
+
+        <!-- Checks the padding of an empty for initializer. !-->
+        <!-- See http://yle.sf.net/config_whitespace.html !-->
+        <module name="EmptyForInitializerPad">
+            <property name="option" value="nospace"/>
+        </module>
+
+        <!-- Checks the padding of an empty for iterator. !-->
+        <!-- See http://yle.sf.net/config_whitespace.html !-->
+        <module name="EmptyForIteratorPad">
+            <property name="option" value="nospace"/>
+        </module>
+
+        <!-- Checks that the whitespace around the Generic tokens < and > is correct to the typical convention. !-->
+        <!-- See http://yle.sourceforge.net/config_whitespace.html#GenericWhitespace !-->
+        <module name="GenericWhitespace"/>
+
+        <!-- Checks the padding between the identifier of a method definition, !-->
+        <!-- constructor definition, method call, or constructor invocation; and the left parenthesis of the parameter list. !-->
+        <!-- See http://yle.sf.net/config_whitespace.html !-->
+        <module name="MethodParamPad">
+            <property name="allowLineBreaks" value="false"/>
+            <property name="option" value="nospace"/>
+            <property name="tokens" value="CTOR_DEF, LITERAL_NEW, METHOD_CALL, METHOD_DEF, SUPER_CTOR_CALL "/>
+        </module>
+
+        <!-- Checks that there is no whitespace after a token. !-->
+        <!-- See http://yle.sf.net/config_whitespace.html !-->
+        <module name="NoWhitespaceAfter">
+            <property name="allowLineBreaks" value="true"/>
+            <property name="tokens" value="ARRAY_INIT, BNOT, DEC, DOT, INC, LNOT, UNARY_MINUS, UNARY_PLUS"/>
+        </module>
+
+        <!-- Checks that there is no whitespace before a token. !-->
+        <!-- See http://yle.sf.net/config_whitespace.html !-->
+        <module name="NoWhitespaceBefore">
+            <property name="allowLineBreaks" value="false"/>
+            <property name="tokens" value="SEMI, POST_DEC, POST_INC"/>
+        </module>
+
+        <!-- Checks the policy on how to wrap lines on operators. !-->
+        <!-- See http://yle.sf.net/config_whitespace.html !-->
+        <module name="OperatorWrap">
+            <property name="option" value="nl"/>
+            <property name="tokens" value="ASSIGN, BAND, BOR, BSR, BXOR, COLON, DIV,             EQUAL, GE, GT, LAND, LE, LITERAL_INSTANCEOF,             LOR, LT, MINUS, MOD, NOT_EQUAL,             PLUS, QUESTION, SL, SR, STAR"/>
+        </module>
+
+        <!-- Checks the policy on the padding of parentheses. !-->
+        <!-- See http://yle.sf.net/config_whitespace.html !-->
+        <module name="ParenPad">
+            <property name="option" value="nospace"/>
+            <property name="tokens" value="CTOR_CALL, METHOD_CALL, SUPER_CTOR_CALL"/>
+        </module>
+
+        <!-- Checks the policy on the padding of parentheses for typecasts. !-->
+        <!-- See http://yle.sf.net/config_whitespace.html !-->
+        <module name="TypecastParenPad">
+            <property name="option" value="nospace"/>
+            <property name="tokens" value="TYPECAST, RPAREN"/>
+        </module>
+
+        <!-- Checks that a token is followed by whitespace. !-->
+        <!-- See http://yle.sf.net/config_whitespace.html !-->
+        <module name="WhitespaceAfter">
+            <property name="tokens" value="COMMA, SEMI, TYPECAST"/>
+        </module>
+
+        <!-- Checks that a token is surrounded by whitespace. !-->
+        <!-- See http://yle.sf.net/config_whitespace.html !-->
+        <module name="WhitespaceAround">
+            <property name="tokens" value="ASSIGN, BAND, BAND_ASSIGN, BOR, BOR_ASSIGN, BSR, BSR_ASSIGN,             BXOR, BXOR_ASSIGN, COLON, DIV, DIV_ASSIGN, EQUAL, GE, GT, LAND,             LCURLY, LE, LITERAL_ASSERT, LITERAL_CATCH, LITERAL_DO, LITERAL_ELSE,             LITERAL_FINALLY, LITERAL_FOR, LITERAL_IF, LITERAL_RETURN,             LITERAL_SYNCHRONIZED, LITERAL_TRY, LITERAL_WHILE, LOR, LT,             MINUS, MINUS_ASSIGN, MOD, MOD_ASSIGN, NOT_EQUAL, PLUS, PLUS_ASSIGN,             QUESTION, RCURLY, SL, SLIST, SL_ASSIGN, SR, SR_ASSIGN, STAR, STAR_ASSIGN"/>
+            <property name="allowEmptyConstructors" value="false"/>
+            <property name="allowEmptyMethods" value="false"/>
+        </module>
+
+        <!-- Checks that there are empty lines between methods etc. !-->
+        <!-- http://yle.sourceforge.net/config_whitespace.html#EmptyLineSeparator !-->
+        <module name="EmptyLineSeparator">
+            <property name="allowNoEmptyLineBetweenFields" value="true"/>
+        </module>
+
+        <!-- The following are actually not whitespace  but still fit here quite well. !-->
+
+        <!-- Checks that there is only one statement per line. !-->
+        <!-- See http://yle.sourceforge.net/config_coding.html#OneStatementPerLine !-->
+        <module name="OneStatementPerLine"/>
+
+        <!-- Checks that each variable declaration is in its own statement and on its own line. !-->
+        <!-- See http://yle.sf.net/config_coding.html !-->
+        <module name="MultipleVariableDeclarations"/>
+
+        <!-- Checks for correct indentation -->
+        <!-- http://yle.sourceforge.net/config_misc.html#Indentation -->
+        <module name="Indentation"/>
+
+    </module>
+
+    <!-- Checks that there are no tabs in the source file !-->
+    <!-- http://yle.sourceforge.net/config_whitespace.html#FileTabCharacter !-->
+    <module name="FileTabCharacter"/>
+
+    <!-- ######## END OF TEMPLATE/CHECKSTYLE/WHITESPACE.XML ######## !-->
+
+    <!-- ######## TEMPLATE/CHECKSTYLE/NAMING.XML ######## !-->
+    <module name="TreeWalker">
+        <!-- Checks that the outer type name and the file name match. !-->
+        <!-- See http://yle.sourceforge.net/config_misc.html#OuterTypeFilename !-->
+        <module name="OuterTypeFilename"/>
+
+        <!-- Checks for class type parameter name naming conventions. !-->
+        <!-- See http://yle.sourceforge.net/config_naming.html#ClassTypeParameterName !-->
+        <module name="ClassTypeParameterName">
+            <property name="format" value="^[A-Z]$"/>
+        </module>
+
+        <!-- Checks for constant name naming conventions. !-->
+        <!-- See http://yle.sf.net/config_naming.html !-->
+        <module name="ConstantName">
+            <property name="format" value="^[A-Z][A-Z0-9]*(_[A-Z0-9]+)*$"/>
+            <property name="applyToPublic" value="true"/>
+            <property name="applyToProtected" value="true"/>
+            <property name="applyToPackage" value="true"/>
+            <property name="applyToPrivate" value="true"/>
+        </module>
+
+        <!-- Checks for local final variable name naming conventions. !-->
+        <!-- See http://yle.sf.net/config_naming.html !-->
+        <module name="LocalFinalVariableName">
+            <property name="format" value="^[a-z][a-zA-Z0-9]*$"/>
+            <property name="tokens" value="VARIABLE_DEF, PARAMETER_DEF"/>
+        </module>
+
+        <!-- Checks for local variable name naming conventions. !-->
+        <!-- See http://yle.sf.net/config_naming.html !-->
+        <module name="LocalVariableName">
+            <property name="format" value="^[a-z][a-zA-Z0-9]*$"/>
+            <!--<property name="tokens" value="VARIABLE_DEF, PARAMETER_DEF"/>-->
+        </module>
+
+        <!-- Checks for member variable name naming conventions. !-->
+        <!-- See http://yle.sf.net/config_naming.html !-->
+        <module name="MemberName">
+            <property name="format" value="^[a-z][a-zA-Z0-9]*$"/>
+            <property name="applyToPublic" value="true"/>
+            <property name="applyToProtected" value="true"/>
+            <property name="applyToPackage" value="true"/>
+            <property name="applyToPrivate" value="true"/>
+        </module>
+
+        <!-- Checks for method name naming conventions. !-->
+        <!-- See http://yle.sf.net/config_naming.html !-->
+        <module name="MethodName">
+            <property name="format" value="^[a-z][a-zA-Z0-9]*$"/>
+        </module>
+
+        <!-- Checks for method type parameter name naming conventions. !-->
+        <!-- See http://yle.sourceforge.net/config_naming.html#MethodTypeParameterName !-->
+        <module name="MethodTypeParameterName">
+            <property name="format" value="^[A-Z]$"/>
+        </module>
+
+        <!-- Checks for package name naming conventions. !-->
+        <!-- See http://yle.sf.net/config_naming.html !-->
+        <module name="PackageName">
+            <property name="format" value="^[a-z]+(\.[a-zA-Z_][a-zA-Z0-9_]*)*$"/>
+        </module>
+
+        <!-- Checks for parameter name naming conventions. !-->
+        <!-- See http://yle.sf.net/config_naming.html !-->
+        <module name="ParameterName">
+            <property name="format" value="^[a-z][a-zA-Z0-9]*$"/>
+        </module>
+
+        <!-- Checks for static variable name naming conventions. !-->
+        <!-- See http://yle.sf.net/config_naming.html !-->
+        <module name="StaticVariableName">
+            <property name="format" value="^[a-z][a-zA-Z0-9]*$"/>
+            <property name="applyToPublic" value="true"/>
+            <property name="applyToProtected" value="true"/>
+            <property name="applyToPackage" value="true"/>
+            <property name="applyToPrivate" value="true"/>
+        </module>
+
+        <!-- Checks for type name naming conventions. !-->
+        <!-- See http://yle.sf.net/config_naming.html !-->
+        <module name="TypeName">
+            <property name="format" value="^[A-Z][a-zA-Z0-9]*$"/>
+            <property name="tokens" value="CLASS_DEF, INTERFACE_DEF"/>
+            <property name="applyToPublic" value="true"/>
+            <property name="applyToProtected" value="true"/>
+            <property name="applyToPackage" value="true"/>
+            <property name="applyToPrivate" value="true"/>
+        </module>
+
+    </module>
+
+    <!-- ######## END OF TEMPLATE/CHECKSTYLE/NAMING.XML ######## !-->
+	<!-- ######## TEMPLATE/CHECKSTYLE/JAVADOC.XML ######## !-->
+    <module name="TreeWalker">
+
+        <!-- Validates Javadoc comments to help ensure they are well formed. !-->
+        <!-- See http://yle.sf.net/config_html#JavadocStyle !-->
+        <module name="JavadocStyle">
+            <property name="scope" value="private"/>
+            <!--
+             <property name="excludeScope"        value=""/>
+             !-->
+            <property name="checkFirstSentence" value="false"/>
+            <property name="endOfSentenceFormat" value="([.?!][ \t\n\r\f&lt;])|([.?!]$)"/>
+            <property name="checkEmptyJavadoc" value="false"/>
+            <property name="checkHtml" value="true"/>
+            <property name="tokens" value="INTERFACE_DEF, CLASS_DEF, METHOD_DEF, CTOR_DEF, VARIABLE_DEF"/>
+        </module>
+
+        <!-- Checks to ensure that the tags exist (if required) !-->
+        <!-- See http://yle.sf.net/config_html#JavadocMethod !-->
+        <module name="JavadocMethod">
+            <property name="scope" value="package"/>
+            <!--
+             <property name="excludeScope"                 value=""/>
+             !-->
+            <property name="allowMissingParamTags" value="false"/>
+            <property name="allowMissingReturnTag" value="false"/>
+            <property name="tokens" value="METHOD_DEF, CTOR_DEF"/>
+        </module>
+
+        <!-- Checks that variables have Javadoc comments. !-->
+        <!-- See http://yle.sf.net/config_html#JavadocVariable !-->
+        <module name="JavadocVariable">
+            <property name="scope" value="package"/>
+            <!--
+             <property name="excludeScope" value=""/>
+             !-->
+        </module>
+
+		<!-- Checks Javadoc comments for class and interface definitions. !-->
+        <!-- See http://yle.sf.net/config_html#JavadocType !-->
+        <module name="JavadocType">
+            <property name="scope"                 value="private"/>
+            <!--
+            <property name="excludeScope"          value=""/>
+            !-->
+            <property name="authorFormat"          value=""/>
+            <property name="versionFormat"         value=""/>
+            <property name="allowMissingParamTags" value="false"/>
+            <property name="allowUnknownTags"      value="false"/>
+            <property name="tokens"                value="INTERFACE_DEF, CLASS_DEF"/>
+        </module>
+
+    </module>
+    <!-- ######## END OF TEMPLATE/CHECKSTYLE/JAVADOC.XML ######## !-->
+    <!-- ######## TEMPLATE/CHECKSTYLE/OTHERS.XML ######## !-->
+    <module name="TreeWalker">
+
+        <!-- Checks that the order of  conforms to the suggestions in the Java Language specification, !-->
+        <!-- sections 8.1.1, 8.3.1 and 8.4.3. !-->
+        <!-- See http://yle.sf.net/config_.html !-->
+        <module name="ModifierOrder"/>
+
+        <!-- Checks that there are no redundant . !-->
+        <!-- See http://yle.sf.net/config_.html !-->
+        <module name="RedundantModifier">
+            <property name="tokens" value="METHOD_DEF, VARIABLE_DEF, ANNOTATION_FIELD_DEF"/>
+        </module>
+
+        <!-- Checks that a class which has only private constructors is declared as final. !-->
+        <!-- See http://yle.sf.net/config_html !-->
+        <module name="FinalClass"/>
+
+        <!-- Check nested (internal) classes/interfaces are declared at the bottom of the class after all method and field declarations. !-->
+        <!-- See http://yle.sourceforge.net/config_html#InnerTypeLast !-->
+        <module name="InnerTypeLast"/>
+
+        <!-- Implements Bloch, Effective Java, Item 17 - Use Interfaces only to define types. !-->
+        <!-- See http://yle.sf.net/config_html !-->
+        <module name="InterfaceIsType">
+            <property name="allowMarkerInterfaces" value="false"/>
+        </module>
+
+        <!-- Restricts throws statements to a specified count. !-->
+        <!-- See http://yle.sf.net/config_html !-->
+        <module name="ThrowsCount">
+            <property name="max" value="2"/>
+        </module>
+
+        <!-- Checks that classes that define a covariant equals() method also override method equals(java.lang.Object). !-->
+        <!-- See http://yle.sf.net/config_coding.html !-->
+        <module name="CovariantEquals"/>
+
+        <!-- Checks declaration order according to Code Conventions for the Java Programming Language. !-->
+        <!-- See http://yle.sf.net/config_coding.html !-->
+        <module name="DeclarationOrder">
+            <property name="ignoreConstructors" value="false"/>
+            <property name="ignoreModifiers" value="false"/>
+        </module>
+
+        <!-- Check that the default is after all the cases in a switch statement. !-->
+        <!-- See http://yle.sf.net/config_coding.html !-->
+        <module name="DefaultComesLast"/>
+
+        <!-- Detects empty statements (standalone ;). !-->
+        <!-- See http://yle.sf.net/config_coding.html !-->
+        <module name="EmptyStatement"/>
+
+        <!-- Catching java.lang.Exception, java.lang.Error or java.lang.RuntimeException is almost never acceptable. !-->
+        <!-- See http://yle.sf.net/config_coding.html !-->
+        <module name="IllegalCatch">
+            <property name="illegalClassNames" value="java.lang.Exception, java.lang.Throwable, java.lang.RuntimeException"/>
+        </module>
+
+        <!-- This check can be used to ensure that types are not declared to be thrown. !-->
+        <!-- Declaring to throw java.lang.Error or java.lang.RuntimeException is almost never acceptable. !-->
+        <!-- See http://yle.sourceforge.net/config_coding.html#IllegalThrows !-->
+        <module name="IllegalThrows">
+            <property name="illegalClassNames" value="java.lang.Throwable, java.lang.Error, java.lang.RuntimeException"/>
+        </module>
+
+        <!-- Checks for assignments in subexpressions, such as in String s = Integer.toString(i = 2);. !-->
+        <!-- See http://yle.sf.net/config_coding.html !-->
+        <module name="InnerAssignment">
+            <property name="tokens" value="ASSIGN, BAND_ASSIGN, BOR_ASSIGN, BSR_ASSIGN, BXOR_ASSIGN,             DIV_ASSIGN, MINUS_ASSIGN, MOD_ASSIGN, PLUS_ASSIGN, SL_ASSIGN,             SR_ASSIGN, STAR_ASSIGN"/>
+        </module>
+
+        <!-- Checks that switch statement has "default" clause. !-->
+        <!-- See http://yle.sf.net/config_coding.html !-->
+        <module name="MissingSwitchDefault"/>
+
+        <!-- Check for ensuring that for loop control variables are not modified inside the for block. !-->
+        <!-- See http://yle.sourceforge.net/config_coding.html#ModifiedControlVariable !-->
+        <module name="ModifiedControlVariable"/>
+
+        <!-- Disallow assignment of parameters. !-->
+        <!-- See http://yle.sf.net/config_coding.html !-->
+        <module name="ParameterAssignment"/>
+
+        <!-- this got moved here from the import !-->
+        <!-- Checks for unused import statements. !-->
+        <!-- See http://yle.sf.net/config_import.html !-->
+        <module name="UnusedImports"/>
+
+    </module>
+    <!-- ######## END OF TEMPLATE/CHECKSTYLE/OTHERS.XML ######## !-->
+</module>