diff --git a/config.xml b/config.xml
new file mode 100644
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+++ b/config.xml
@@ -0,0 +1,328 @@
+<?xml version="1.0"?>
+<!DOCTYPE module PUBLIC
+ "-//Checkstyle//DTD Checkstyle Configuration 1.3//EN"
+ "https://checkstyle.org/dtds/configuration_1_3.dtd">
+
+<module name = "Checker">
+ <property name="charset" value="UTF-8"/>
+ <property name="localeLanguage" value="de"/>
+
+ <property name="severity" value="warning"/>
+
+ <property name="fileExtensions" value="java, properties, xml"/>
+
+ <module name="LineLength">
+ <property name="fileExtensions" value="java"/>
+ <property name="max" value="100"/>
+ <property name="ignorePattern" value="^package.*|^import.*|a href|href|http://|https://|ftp://"/>
+ </module>
+
+ <module name="RegexpMultiline">
+ <property name="format" value="\*\/\s*(\n\s*){2,}"/>
+ <property name="matchAcrossLines" value="true"/>
+ <property name="maximum" value="0" />
+ <message key="regexp.exceeded"
+ value="Zwischen Javadoc und nächster Codezeile sollten keine Leerzeilen stehen." />
+ </module>
+ <module name="RegexpMultiline">
+ <property name="format" value="(\n\s*){4,}"/>
+ <property name="matchAcrossLines" value="true"/>
+ <property name="maximum" value="0" />
+ <message key="regexp.exceeded"
+ value="Es sollten nicht mehr als zwei aufeinanderfolgende Leerzeilen im Code stehen." />
+ </module>
+ <module name="RegexpSingleline">
+ <property name="format" value="\/\*\*.+\*\/"/>
+ <property name="maximum" value="0" />
+ <message key="regexp.exceeded"
+ value="Javadoc-Kommentare sollten nicht auf nur einer Zeile stehen." />
+ </module>
+ <module name="RegexpSingleline">
+ <property name="format" value="\*.+\*\/"/>
+ <property name="maximum" value="0" />
+ <message key="regexp.exceeded"
+ value="Javadoc-Kommentare sollten in einer separaten Zeile nur mit '*/' enden." />
+ </module>
+
+ <module name="TreeWalker">
+ <module name="EmptyBlock">
+ <property name="option" value="TEXT"/>
+ <property name="tokens"
+ value="LITERAL_TRY, LITERAL_FINALLY, LITERAL_IF, LITERAL_ELSE, LITERAL_SWITCH"/>
+ </module>
+ <module name="NeedBraces">
+ <property name="tokens"
+ value="LITERAL_DO, LITERAL_ELSE, LITERAL_FOR, LITERAL_IF, LITERAL_WHILE"/>
+ </module>
+ <module name="LeftCurly">
+ <property name="option" value="nl"/>
+ <property name="tokens"
+ value="ANNOTATION_DEF, CLASS_DEF, CTOR_DEF, ENUM_CONSTANT_DEF, ENUM_DEF,
+ INTERFACE_DEF, LAMBDA, LITERAL_CASE, LITERAL_CATCH, LITERAL_DEFAULT,
+ LITERAL_DO, LITERAL_ELSE, LITERAL_FINALLY, LITERAL_FOR, LITERAL_IF,
+ LITERAL_SWITCH, LITERAL_SYNCHRONIZED, LITERAL_TRY, LITERAL_WHILE, METHOD_DEF,
+ OBJBLOCK, STATIC_INIT, RECORD_DEF, COMPACT_CTOR_DEF"/>
+ </module>
+ <module name="RightCurly">
+ <property name="id" value="RightCurlyAlone"/>
+ <property name="option" value="alone"/>
+ <property name="tokens"
+ value="CLASS_DEF, METHOD_DEF, CTOR_DEF, LITERAL_FOR, LITERAL_WHILE, STATIC_INIT,
+ INSTANCE_INIT, ANNOTATION_DEF, ENUM_DEF, INTERFACE_DEF, RECORD_DEF,
+ COMPACT_CTOR_DEF, LITERAL_TRY, LITERAL_CATCH, LITERAL_FINALLY, LITERAL_IF, LITERAL_ELSE,
+ LITERAL_DO"/>
+ </module>
+ <module name="WhitespaceAfter">
+ <property name="tokens"
+ value="COMMA, SEMI, TYPECAST, LITERAL_IF, LITERAL_ELSE,
+ LITERAL_WHILE, LITERAL_DO, LITERAL_FOR, DO_WHILE"/>
+ </module>
+ <module name="WhitespaceAround">
+ <property name="allowEmptyConstructors" value="true"/>
+ <property name="allowEmptyLambdas" value="true"/>
+ <property name="allowEmptyMethods" value="true"/>
+ <property name="allowEmptyTypes" value="true"/>
+ <property name="allowEmptyLoops" value="true"/>
+ <property name="ignoreEnhancedForColon" value="false"/>
+ <property name="tokens"
+ value="ASSIGN, BAND, BAND_ASSIGN, BOR, BOR_ASSIGN, BSR, BSR_ASSIGN, BXOR,
+ BXOR_ASSIGN, COLON, DIV, DIV_ASSIGN, DO_WHILE, EQUAL, GE, GT, LAMBDA, LAND,
+ LCURLY, LE, LITERAL_CATCH, LITERAL_DO, LITERAL_ELSE, LITERAL_FINALLY,
+ LITERAL_FOR, LITERAL_IF, LITERAL_RETURN, LITERAL_SWITCH, 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, LITERAL_ASSERT, TYPE_EXTENSION_AND"/>
+ <message key="ws.notFollowed"
+ value="Hinter ''{0}'' steht kein Leerzeichen."/>
+ <message key="ws.notPreceded"
+ value="Vor ''{0}'' muss ein Leerzeichen stehen."/>
+ </module>
+ <module name="OneStatementPerLine"/>
+ <module name="MultipleVariableDeclarations"/>
+ <module name="ArrayTypeStyle"/>
+ <module name="MissingSwitchDefault"/>
+ <module name="MissingCtor"/>
+ <module name="FallThrough"/>
+ <module name="UpperEll"/>
+ <module name="ModifierOrder"/>
+ <module name="EmptyLineSeparator">
+ <property name="tokens"
+ value="PACKAGE_DEF, IMPORT, STATIC_IMPORT, CLASS_DEF, INTERFACE_DEF, ENUM_DEF,
+ STATIC_INIT, INSTANCE_INIT, METHOD_DEF, CTOR_DEF, VARIABLE_DEF, RECORD_DEF,
+ COMPACT_CTOR_DEF"/>
+ <property name="allowNoEmptyLineBetweenFields" value="true"/>
+ </module>
+ <module name="SeparatorWrap">
+ <property name="id" value="SeparatorWrapDot"/>
+ <property name="tokens" value="DOT"/>
+ <property name="option" value="nl"/>
+ </module>
+ <module name="SeparatorWrap">
+ <property name="id" value="SeparatorWrapComma"/>
+ <property name="tokens" value="COMMA"/>
+ <property name="option" value="EOL"/>
+ </module>
+ <module name="SeparatorWrap">
+ <!-- ELLIPSIS is EOL until https://github.com/google/styleguide/issues/259 -->
+ <property name="id" value="SeparatorWrapEllipsis"/>
+ <property name="tokens" value="ELLIPSIS"/>
+ <property name="option" value="EOL"/>
+ </module>
+ <module name="SeparatorWrap">
+ <!-- ARRAY_DECLARATOR is EOL until https://github.com/google/styleguide/issues/258 -->
+ <property name="id" value="SeparatorWrapArrayDeclarator"/>
+ <property name="tokens" value="ARRAY_DECLARATOR"/>
+ <property name="option" value="EOL"/>
+ </module>
+ <module name="SeparatorWrap">
+ <property name="id" value="SeparatorWrapMethodRef"/>
+ <property name="tokens" value="METHOD_REF"/>
+ <property name="option" value="nl"/>
+ </module>
+ <module name="TypeName">
+ <property name="tokens" value="CLASS_DEF, INTERFACE_DEF, ENUM_DEF,
+ ANNOTATION_DEF, RECORD_DEF"/>
+ <message key="name.invalidPattern"
+ value="Der Name ''{0}'' folgt nicht den Quelltextkonventionen."/>
+ </module>
+ <module name="ConstantName">
+ <property name="format" value="^[A-Z][A-Z0-9_]*[A-Z0-9]?$"/>
+ <message key="name.invalidPattern"
+ value="Der Name der Konstanten ''{0}'' folgt nicht den Quelltextkonventionen."/>
+ </module>
+ <module name="MemberName">
+ <property name="format" value="^_[a-z][a-z0-9][a-zA-Z0-9]*$"/>
+ <message key="name.invalidPattern"
+ value="Der Name des Zustandsfeldes ''{0}'' folgt nicht den Quelltextkonventionen."/>
+ </module>
+ <module name="ParameterName">
+ <property name="format" value="^[a-z]([a-z0-9][a-zA-Z0-9]*)?$"/>
+ <message key="name.invalidPattern"
+ value="Der Name des Parameters ''{0}'' folgt nicht den Quelltextkonventionen."/>
+ </module>
+ <module name="LambdaParameterName">
+ <property name="format" value="^[a-z]([a-z0-9][a-zA-Z0-9]*)?$"/>
+ <message key="name.invalidPattern"
+ value="Der Name des Lambda-Parameters ''{0}'' folgt nicht den Quelltextkonventionen."/>
+ </module>
+ <module name="CatchParameterName">
+ <property name="format" value="^[a-z]([a-z0-9][a-zA-Z0-9]*)?$"/>
+ <message key="name.invalidPattern"
+ value="Der Name des Catch-Parameters ''{0}'' folgt nicht den Quelltextkonventionen."/>
+ </module>
+ <module name="LocalVariableName">
+ <property name="format" value="^[a-z]([a-z0-9][a-zA-Z0-9]*)?$"/>
+ <message key="name.invalidPattern"
+ value="Der Name der lokalen Variable ''{0}'' folgt nicht den Quelltextkonventionen."/>
+ </module>
+ <module name="PatternVariableName">
+ <property name="format" value="^[a-z]([a-z0-9][a-zA-Z0-9]*)?$"/>
+ <message key="name.invalidPattern"
+ value="Der Name der Pattern-Variable ''{0}'' folgt nicht den Quelltextkonventionen."/>
+ </module>
+ <!--
+ <module name="ClassTypeParameterName">
+ <property name="format" value="(^[A-Z][0-9]?)$|([A-Z][a-zA-Z0-9]*[T]$)"/>
+ <message key="name.invalidPattern"
+ value="Class type name ''{0}'' must match pattern ''{1}''."/>
+ </module>
+ <module name="RecordComponentName">
+ <property name="format" value="^[a-z]([a-z0-9][a-zA-Z0-9]*)?$"/>
+ <message key="name.invalidPattern"
+ value="Record component name ''{0}'' must match pattern ''{1}''."/>
+ </module>
+ <module name="RecordTypeParameterName">
+ <property name="format" value="(^[A-Z][0-9]?)$|([A-Z][a-zA-Z0-9]*[T]$)"/>
+ <message key="name.invalidPattern"
+ value="Record type name ''{0}'' must match pattern ''{1}''."/>
+ </module>
+ <module name="MethodTypeParameterName">
+ <property name="format" value="(^[A-Z][0-9]?)$|([A-Z][a-zA-Z0-9]*[T]$)"/>
+ <message key="name.invalidPattern"
+ value="Method type name ''{0}'' must match pattern ''{1}''."/>
+ </module>
+ <module name="InterfaceTypeParameterName">
+ <property name="format" value="(^[A-Z][0-9]?)$|([A-Z][a-zA-Z0-9]*[T]$)"/>
+ <message key="name.invalidPattern"
+ value="Interface type name ''{0}'' must match pattern ''{1}''."/>
+ </module>
+ -->
+ <module name="NoFinalizer"/>
+ <module name="GenericWhitespace" />
+ <module name="HiddenField" />
+ <module name="Indentation">
+ <property name="basicOffset" value="4"/>
+ <property name="braceAdjustment" value="0"/>
+ <property name="caseIndent" value="4"/>
+ <property name="throwsIndent" value="4"/>
+ <property name="lineWrappingIndentation" value="4"/>
+ <property name="arrayInitIndent" value="4"/>
+ </module>
+ <module name="NoWhitespaceBeforeCaseDefaultColon"/>
+ <module name="MethodParamPad">
+ <property name="tokens"
+ value="CTOR_DEF, LITERAL_NEW, METHOD_CALL, METHOD_DEF,
+ SUPER_CTOR_CALL, ENUM_CONSTANT_DEF, RECORD_DEF"/>
+ </module>
+ <module name="NoWhitespaceBefore">
+ <property name="tokens"
+ value="COMMA, SEMI, POST_INC, POST_DEC, DOT,
+ LABELED_STAT, METHOD_REF"/>
+ <property name="allowLineBreaks" value="true"/>
+ </module>
+ <module name="ParenPad">
+ <property name="tokens"
+ value="ANNOTATION, ANNOTATION_FIELD_DEF, CTOR_CALL, CTOR_DEF, DOT, ENUM_CONSTANT_DEF,
+ EXPR, LITERAL_CATCH, LITERAL_DO, LITERAL_FOR, LITERAL_IF, LITERAL_NEW,
+ LITERAL_SWITCH, LITERAL_SYNCHRONIZED, LITERAL_WHILE, METHOD_CALL,
+ METHOD_DEF, QUESTION, RESOURCE_SPECIFICATION, SUPER_CTOR_CALL, LAMBDA,
+ RECORD_DEF"/>
+ </module>
+ <module name="OperatorWrap">
+ <property name="option" value="NL"/>
+ <property name="tokens"
+ value="BAND, BOR, BSR, BXOR, DIV, EQUAL, GE, GT, LAND, LE, LITERAL_INSTANCEOF, LOR,
+ LT, MINUS, MOD, NOT_EQUAL, PLUS, QUESTION, SL, SR, STAR, METHOD_REF,
+ TYPE_EXTENSION_AND "/>
+ </module>
+ <module name="AnnotationLocation">
+ <property name="id" value="AnnotationLocationMostCases"/>
+ <property name="tokens"
+ value="CLASS_DEF, INTERFACE_DEF, ENUM_DEF, METHOD_DEF, CTOR_DEF,
+ RECORD_DEF, COMPACT_CTOR_DEF"/>
+ </module>
+ <module name="AnnotationLocation">
+ <property name="id" value="AnnotationLocationVariables"/>
+ <property name="tokens" value="VARIABLE_DEF"/>
+ <property name="allowSamelineMultipleAnnotations" value="true"/>
+ </module>
+ <module name="NonEmptyAtclauseDescription"/>
+ <module name="InvalidJavadocPosition"/>
+ <module name="JavadocTagContinuationIndentation"/>
+ <module name="JavadocParagraph"/>
+ <module name="AtclauseOrder">
+ <property name="tagOrder" value="@param, @return, @throws, @deprecated"/>
+ <property name="target"
+ value="CLASS_DEF, INTERFACE_DEF, ENUM_DEF, METHOD_DEF, CTOR_DEF, VARIABLE_DEF"/>
+ </module>
+ <module name="JavadocMethod">
+ <property name="accessModifiers" value="package, public"/>
+ <property name="allowedAnnotations" value="Override, Test"/>
+ <property name="allowMissingParamTags" value="false" />
+ <property name="allowMissingReturnTag" value="false" />
+ <property name="tokens" value="METHOD_DEF, CTOR_DEF, ANNOTATION_FIELD_DEF, COMPACT_CTOR_DEF"/>
+ </module>
+ <module name="JavadocContentLocationCheck">
+ <property name="location" value="second_line" />
+ </module>
+ <module name="MissingJavadocMethod">
+ <property name="scope" value="package"/>
+ <property name="allowedAnnotations" value="Override, Test"/>
+ <property name="tokens" value="METHOD_DEF, CTOR_DEF, ANNOTATION_FIELD_DEF,
+ COMPACT_CTOR_DEF"/>
+ </module>
+ <module name="JavadocType">
+ <property name="authorFormat" value="^.+$" />
+ <property name="versionFormat" value="^.+$" />
+ <property name="allowUnknownTags" value="false" />
+ <message key="type.tagFormat" value="Der @version oder @author Tag fehlen im Javadoc-Kommentar." />
+ </module>
+ <module name="MissingJavadocType">
+ <property name="scope" value="package"/>
+ <property name="tokens"
+ value="CLASS_DEF, INTERFACE_DEF, ENUM_DEF,
+ RECORD_DEF, ANNOTATION_DEF"/>
+ </module>
+ <module name="JavadocStyle">
+ <property name="checkEmptyJavadoc" value="true" />
+ </module>
+ <module name="VisibilityModifier">
+ <property name="packageAllowed" value="false"/>
+ <property name="protectedAllowed" value="false"/>
+ </module>
+ <module name="MethodName">
+ <property name="format" value="^[a-z][a-z0-9][a-zA-Z0-9_]*$"/>
+ <message key="name.invalidPattern"
+ value="Der Name der Methode ''{0}'' folgt nicht den Quelltextkonventionen"/>
+ </module>
+ <module name="SingleLineJavadoc">
+ <property name="ignoreInlineTags" value="false"/>
+ </module>
+ <module name="EmptyCatchBlock">
+ <property name="exceptionVariableName" value="expected"/>
+ </module>
+ <module name="CommentsIndentation">
+ <property name="tokens" value="SINGLE_LINE_COMMENT, BLOCK_COMMENT_BEGIN"/>
+ </module>
+ <module name="SimplifyBooleanExpression"/>
+ <module name="SimplifyBooleanReturn"/>
+ <module name="StringLiteralEquality"/>
+ <module name="ExplicitInitialization"/>
+ <module name="EmptyStatement"/>
+
+ <module name="SuppressionCommentFilter">
+ <property name="offCommentFormat" value="STOP CHECKSTYLE"/>
+ <property name="onCommentFormat" value="START CHECKSTYLE"/>
+ </module>
+ </module>
+</module>
\ No newline at end of file