Initial commit

.gitignore

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+
+# Created by https://www.toptal.com/developers/gitignore/api/intellij,java
+# Edit at https://www.toptal.com/developers/gitignore?templates=intellij,java
+
+### Intellij ###
+# Covers JetBrains IDEs: IntelliJ, RubyMine, PhpStorm, AppCode, PyCharm, CLion, Android Studio, WebStorm and Rider
+# Reference: https://intellij-support.jetbrains.com/hc/en-us/articles/206544839
+
+# User-specific stuff
+.idea/**/workspace.xml
+.idea/**/tasks.xml
+.idea/**/usage.statistics.xml
+.idea/**/dictionaries
+.idea/**/shelf
+
+# AWS User-specific
+.idea/**/aws.xml
+
+# Generated files
+.idea/**/contentModel.xml
+
+# Sensitive or high-churn files
+.idea/**/dataSources/
+.idea/**/dataSources.ids
+.idea/**/dataSources.local.xml
+.idea/**/sqlDataSources.xml
+.idea/**/dynamic.xml
+.idea/**/uiDesigner.xml
+.idea/**/dbnavigator.xml
+
+# Gradle
+.idea/**/gradle.xml
+.idea/**/libraries
+
+# Gradle and Maven with auto-import
+# When using Gradle or Maven with auto-import, you should exclude module files,
+# since they will be recreated, and may cause churn.  Uncomment if using
+# auto-import.
+# .idea/artifacts
+# .idea/compiler.xml
+# .idea/jarRepositories.xml
+# .idea/modules.xml
+# .idea/*.iml
+# .idea/modules
+# *.iml
+# *.ipr
+
+# CMake
+cmake-build-*/
+
+# Mongo Explorer plugin
+.idea/**/mongoSettings.xml
+
+# File-based project format
+*.iws
+
+# IntelliJ
+out/
+
+# mpeltonen/sbt-idea plugin
+.idea_modules/
+
+# JIRA plugin
+atlassian-ide-plugin.xml
+
+# Cursive Clojure plugin
+.idea/replstate.xml
+
+# Crashlytics plugin (for Android Studio and IntelliJ)
+com_crashlytics_export_strings.xml
+crashlytics.properties
+crashlytics-build.properties
+fabric.properties
+
+# Editor-based Rest Client
+.idea/httpRequests
+
+# Android studio 3.1+ serialized cache file
+.idea/caches/build_file_checksums.ser
+
+### Intellij Patch ###
+# Comment Reason: https://github.com/joeblau/gitignore.io/issues/186#issuecomment-215987721
+
+# *.iml
+# modules.xml
+# .idea/misc.xml
+# *.ipr
+
+# Sonarlint plugin
+# https://plugins.jetbrains.com/plugin/7973-sonarlint
+.idea/**/sonarlint/
+
+# SonarQube Plugin
+# https://plugins.jetbrains.com/plugin/7238-sonarqube-community-plugin
+.idea/**/sonarIssues.xml
+
+# Markdown Navigator plugin
+# https://plugins.jetbrains.com/plugin/7896-markdown-navigator-enhanced
+.idea/**/markdown-navigator.xml
+.idea/**/markdown-navigator-enh.xml
+.idea/**/markdown-navigator/
+
+# Cache file creation bug
+# See https://youtrack.jetbrains.com/issue/JBR-2257
+.idea/$CACHE_FILE$
+
+# CodeStream plugin
+# https://plugins.jetbrains.com/plugin/12206-codestream
+.idea/codestream.xml
+
+### Java ###
+# Compiled class file
+*.class
+
+# Log file
+*.log
+
+# BlueJ files
+*.ctxt
+
+# Mobile Tools for Java (J2ME)
+.mtj.tmp/
+
+# Package Files #
+*.jar
+*.war
+*.nar
+*.ear
+*.zip
+*.tar.gz
+*.rar
+
+# virtual machine crash logs, see http://www.java.com/en/download/help/error_hotspot.xml
+hs_err_pid*
+
+/target/
+.idea/
+*.iml
+.DS_Store
+# End of https://www.toptal.com/developers/gitignore/api/intellij,java

checkstyle.xml

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+<?xml version="1.0"?>
+<!DOCTYPE module PUBLIC "-//Puppy Crawl//DTD Check Configuration 1.3//EN"
+        "http://www.puppycrawl.com/dtds/configuration_1_3.dtd">
+<module name="Checker">
+  <property name="fileExtensions" value="java, properties, xml"/>
+
+  <module name="NewlineAtEndOfFile"/>
+  <module name="FileTabCharacter">
+    <property name="eachLine" value="true"/>
+  </module>
+  <module name="SuppressWarningsFilter" />
+  <module name="TreeWalker">
+	<module name="SuppressWarningsHolder" />
+    <module name="SuppressionCommentFilter"/>
+
+    <module name="AnnotationLocation"/>
+
+    <module name="EmptyBlock">
+      <property name="tokens"
+                value="LITERAL_TRY, LITERAL_FINALLY, LITERAL_IF, LITERAL_ELSE, LITERAL_SWITCH"/>
+    </module>
+    <module name="EmptyCatchBlock"/>
+    <module name="LeftCurly"/>
+    <module name="NeedBraces"/>
+    <module name="RightCurly"/>
+    <module name="RightCurly">
+      <property name="option" value="alone"/>
+      <property name="tokens"
+                value="CLASS_DEF, METHOD_DEF, CTOR_DEF, LITERAL_FOR, LITERAL_WHILE, LITERAL_DO, STATIC_INIT, INSTANCE_INIT"/>
+    </module>
+
+    <module name="OneTopLevelClass"/>
+
+    <module name="DeclarationOrder"/>
+    <module name="DefaultComesLast"/>
+    <module name="EmptyStatement"/>
+    <module name="EqualsAvoidNull"/>
+    <module name="EqualsHashCode"/>
+    <module name="FallThrough"/>
+    <module name="IllegalToken"/>
+    <module name="InnerAssignment"/>
+    <module name="MissingSwitchDefault"/>
+    <module name="ModifiedControlVariable"/>
+    <module name="MultipleVariableDeclarations"/>
+    <module name="NoFinalizer"/>
+    <module name="OneStatementPerLine"/>
+    <module name="OverloadMethodsDeclarationOrder"/>
+    <module name="StringLiteralEquality"/>
+
+    <module name="AvoidStarImport"/>
+    <module name="IllegalImport"/>
+    <module name="ImportOrder">
+      <property name="option" value="top"/>
+      <property name="separated" value="true"/>
+    </module>
+    <module name="RedundantImport"/>
+    <module name="UnusedImports"/>
+
+    <module name="AtclauseOrder"/>
+    <module name="JavadocStyle"/>
+    <module name="NonEmptyAtclauseDescription"/>
+    <module name="SingleLineJavadoc"/>
+
+    <module name="ArrayTypeStyle"/>
+    <module name="AvoidEscapedUnicodeCharacters">
+      <property name="allowEscapesForControlCharacters" value="true"/>
+      <property name="allowByTailComment" value="true"/>
+      <property name="allowNonPrintableEscapes" value="true"/>
+    </module>
+    <module name="CommentsIndentation"/>
+    <module name="Indentation">
+      <property name="basicOffset" value="2"/>
+      <property name="braceAdjustment" value="0"/>
+      <property name="caseIndent" value="2"/>
+      <property name="throwsIndent" value="4"/>
+      <property name="lineWrappingIndentation" value="4"/>
+      <property name="arrayInitIndent" value="2"/>
+    </module>
+    <module name="OuterTypeFilename"/>
+    <module name="UpperEll"/>
+
+    <module name="ModifierOrder"/>
+    <module name="RedundantModifier"/>
+
+    <module name="AbbreviationAsWordInName"/>
+    <module name="CatchParameterName"/>
+    <module name="ClassTypeParameterName"/>
+    <module name="ConstantName"/>
+    <module name="InterfaceTypeParameterName"/>
+    <module name="LocalFinalVariableName"/>
+    <module name="LocalVariableName">
+      <property name="allowOneCharVarInForLoop" value="true"/>
+    </module>
+    <module name="MemberName"/>
+    <module name="MethodName"/>
+    <module name="MethodTypeParameterName"/>
+    <module name="PackageName">
+      <property name="format" value="^[a-z]+(\.[a-z][a-z0-9]*)*$"/>
+    </module>
+    <module name="ParameterName"/>
+    <module name="StaticVariableName"/>
+    <module name="TypeName"/>
+
+    <module name="LineLength">
+      <property name="max" value="100"/>
+      <property name="ignorePattern"
+                value="^package.*|^import.*|a href|href|http://|https://|ftp://"/>
+    </module>
+
+    <module name="EmptyForInitializerPad"/>
+    <module name="EmptyForIteratorPad"/>
+    <module name="EmptyLineSeparator">
+      <property name="allowNoEmptyLineBetweenFields" value="true"/>
+      <property name="allowMultipleEmptyLines" value="false"/>
+      <property name="allowMultipleEmptyLinesInsideClassMembers" value="false"/>
+    </module>
+    <module name="GenericWhitespace"/>
+    <module name="MethodParamPad"/>
+    <module name="NoLineWrap"/>
+    <module name="NoWhitespaceAfter"/>
+    <module name="NoWhitespaceBefore"/>
+    <module name="OperatorWrap">
+      <property name="option" value="nl"/>
+      <property name="tokens" value="QUESTION, COLON, EQUAL, NOT_EQUAL, DIV, MINUS, STAR, MOD, SR, BSR, GE, GT, SL, LE, LT, BXOR, BOR, LOR, BAND, TYPE_EXTENSION_AND, LITERAL_INSTANCEOF"/>
+    </module>
+    <module name="ParenPad"/>
+    <module name="SeparatorWrap">
+      <property name="tokens" value="DOT"/>
+      <property name="option" value="nl"/>
+    </module>
+    <module name="SeparatorWrap">
+      <property name="tokens" value="COMMA"/>
+      <property name="option" value="EOL"/>
+    </module>
+    <module name="TypecastParenPad"/>
+    <module name="WhitespaceAfter"/>
+    <module name="WhitespaceAround">
+      <property name="allowEmptyConstructors" value="true"/>
+      <property name="allowEmptyMethods" value="true"/>
+      <property name="allowEmptyTypes" value="true"/>
+      <property name="allowEmptyLoops" value="true"/>
+    </module>
+  </module>
+</module>