Removed checkstyle, using IDEA default code format.

.idea/compiler.xml

@@ -1,7 +1,7 @@
 <?xml version="1.0" encoding="UTF-8"?>
 <project version="4">
   <component name="CompilerConfiguration">
-    <bytecodeTargetLevel>
+    <bytecodeTargetLevel target="1.8">
       <module name="example_annotationProcessor" target="1.8" />
       <module name="example_main" target="1.8" />
       <module name="example_test" target="1.8" />

.idea/jarRepositories.xml

@@ -26,5 +26,10 @@
       <option name="name" value="BintrayJCenter" />
       <option name="url" value="https://jcenter.bintray.com/" />
     </remote-repository>
+    <remote-repository>
+      <option name="id" value="MavenLocal" />
+      <option name="name" value="MavenLocal" />
+      <option name="url" value="file:$MAVEN_REPOSITORY$/" />
+    </remote-repository>
   </component>
 </project>

.idea/misc.xml

@@ -1,5 +1,61 @@
 <?xml version="1.0" encoding="UTF-8"?>
 <project version="4">
+  <component name="EntryPointsManager">
+    <entry_points version="2.0">
+      <entry_point TYPE="field" FQNAME="net.thauvin.erik.semver.Constants DEFAULT_BUILDMETA_PREFIX" />
+      <entry_point TYPE="field" FQNAME="net.thauvin.erik.semver.Constants DEFAULT_CLASS_NAME" />
+      <entry_point TYPE="field" FQNAME="net.thauvin.erik.semver.Constants DEFAULT_JAVA_TEMPLATE" />
+      <entry_point TYPE="field" FQNAME="net.thauvin.erik.semver.Constants DEFAULT_JAVA_TYPE" />
+      <entry_point TYPE="field" FQNAME="net.thauvin.erik.semver.Constants DEFAULT_KEYS_PREFIX" />
+      <entry_point TYPE="field" FQNAME="net.thauvin.erik.semver.Constants DEFAULT_KOTLIN_TEMPLATE" />
+      <entry_point TYPE="field" FQNAME="net.thauvin.erik.semver.Constants DEFAULT_MAJOR" />
+      <entry_point TYPE="field" FQNAME="net.thauvin.erik.semver.Constants DEFAULT_MINOR" />
+      <entry_point TYPE="field" FQNAME="net.thauvin.erik.semver.Constants DEFAULT_PATCH" />
+      <entry_point TYPE="field" FQNAME="net.thauvin.erik.semver.Constants DEFAULT_PRERELEASE_PREFIX" />
+      <entry_point TYPE="field" FQNAME="net.thauvin.erik.semver.Constants DEFAULT_SEPARATOR" />
+      <entry_point TYPE="field" FQNAME="net.thauvin.erik.semver.Constants DEFAULT_TEMPLATE_NAME" />
+      <entry_point TYPE="field" FQNAME="net.thauvin.erik.semver.Constants EMPTY" />
+      <entry_point TYPE="field" FQNAME="net.thauvin.erik.semver.Constants KAPT_KOTLIN_GENERATED_OPTION_NAME" />
+      <entry_point TYPE="field" FQNAME="net.thauvin.erik.semver.Constants KEY_VERSION_BUILDMETA" />
+      <entry_point TYPE="field" FQNAME="net.thauvin.erik.semver.Constants KEY_VERSION_BUILDMETA_PREFIX" />
+      <entry_point TYPE="field" FQNAME="net.thauvin.erik.semver.Constants KEY_VERSION_MAJOR" />
+      <entry_point TYPE="field" FQNAME="net.thauvin.erik.semver.Constants KEY_VERSION_MINOR" />
+      <entry_point TYPE="field" FQNAME="net.thauvin.erik.semver.Constants KEY_VERSION_PATCH" />
+      <entry_point TYPE="field" FQNAME="net.thauvin.erik.semver.Constants KEY_VERSION_PRERELEASE" />
+      <entry_point TYPE="field" FQNAME="net.thauvin.erik.semver.Constants KEY_VERSION_PRERELEASE_PREFIX" />
+      <entry_point TYPE="field" FQNAME="net.thauvin.erik.semver.Constants KEY_VERSION_PROJECT" />
+      <entry_point TYPE="field" FQNAME="net.thauvin.erik.semver.Constants KEY_VERSION_SEPARATOR" />
+      <entry_point TYPE="field" FQNAME="net.thauvin.erik.semver.Constants KOTLIN_TYPE" />
+      <entry_point TYPE="field" FQNAME="net.thauvin.erik.semver.Constants SEMVER_PROJECT_DIR_ARG" />
+    </entry_points>
+    <pattern value="net.thauvin.erik.semver.Constants" />
+    <pattern value="net.thauvin.erik.semver.VersionInfo" method="getBuildMeta" />
+    <pattern value="net.thauvin.erik.semver.VersionInfo" method="getBuildMetaPrefix" />
+    <pattern value="net.thauvin.erik.semver.VersionInfo" method="getClassName" />
+    <pattern value="net.thauvin.erik.semver.VersionInfo" method="getEpoch" />
+    <pattern value="net.thauvin.erik.semver.VersionInfo" method="getMajor" />
+    <pattern value="net.thauvin.erik.semver.VersionInfo" method="getMinor" />
+    <pattern value="net.thauvin.erik.semver.VersionInfo" method="getPackageName" />
+    <pattern value="net.thauvin.erik.semver.VersionInfo" method="getPatch" />
+    <pattern value="net.thauvin.erik.semver.VersionInfo" method="getPreRelease" />
+    <pattern value="net.thauvin.erik.semver.VersionInfo" method="getPreReleasePrefix" />
+    <pattern value="net.thauvin.erik.semver.VersionInfo" method="getSemver" />
+    <pattern value="net.thauvin.erik.semver.VersionInfo" method="getSeparator" />
+    <pattern value="net.thauvin.erik.semver.VersionInfo" method="setBuildMeta" />
+    <pattern value="net.thauvin.erik.semver.VersionInfo" method="setBuildMetaPrefix" />
+    <pattern value="net.thauvin.erik.semver.VersionInfo" method="setClassName" />
+    <pattern value="net.thauvin.erik.semver.VersionInfo" method="setMajor" />
+    <pattern value="net.thauvin.erik.semver.VersionInfo" method="setMinor" />
+    <pattern value="net.thauvin.erik.semver.VersionInfo" method="setPackageName" />
+    <pattern value="net.thauvin.erik.semver.VersionInfo" method="setPatch" />
+    <pattern value="net.thauvin.erik.semver.VersionInfo" method="setPreRelease" />
+    <pattern value="net.thauvin.erik.semver.VersionInfo" method="setPreReleasePrefix" />
+    <pattern value="net.thauvin.erik.semver.VersionInfo" method="setProject" />
+    <pattern value="net.thauvin.erik.semver.VersionInfo" method="setSeparator" />
+    <pattern value="net.thauvin.erik.semver.VersionInfo" />
+    <pattern value="net.thauvin.erik.semver.VersionInfo" method="VersionInfo" />
+    <pattern value="net.thauvin.erik.semver.Constants" method="Constants" />
+  </component>
   <component name="ExternalStorageConfigurationManager" enabled="true" />
   <component name="FrameworkDetectionExcludesConfiguration">
     <file type="web" url="file://$PROJECT_DIR$" />
@@ -20,7 +76,7 @@
       </map>
     </option>
   </component>
-  <component name="ProjectRootManager" version="2" languageLevel="JDK_1_8" default="false" project-jdk-name="1.8" project-jdk-type="JavaSDK">
+  <component name="ProjectRootManager" version="2" languageLevel="JDK_1_8" project-jdk-name="15" project-jdk-type="JavaSDK">
     <output url="file://$PROJECT_DIR$/out" />
   </component>
 </project>

build.gradle

@@ -1,5 +1,4 @@
 plugins {
-    id 'checkstyle'
     id 'java'
     id 'jacoco'
     id 'maven-publish'
@@ -154,13 +153,6 @@ tasks.withType(SpotBugsTask) {
     }
 }
 
-tasks.withType(Checkstyle) {
-    reports {
-        xml.enabled = false
-        html.enabled = true
-    }
-}
-
 task release {
     group = 'Publishing'
     description = 'Releases new version to local maven repository.'
@@ -194,8 +186,8 @@ task pandoc(type: Exec) {
 jacocoTestReport {
     dependsOn(test)
     reports {
-        html.enabled = true
+        html.required = true
-        xml.enabled = true
+        xml.required = true
     }
 }
 

src/main/java/net/thauvin/erik/semver/Constants.java

@@ -39,7 +39,6 @@ package net.thauvin.erik.semver;
  * @created 2016-01-13
  * @since 1.0
  */
-@SuppressWarnings("WeakerAccess")
 public final class Constants {
     /**
      * The default metadata prefix.

src/main/java/net/thauvin/erik/semver/Version.java

@@ -44,6 +44,7 @@ import java.lang.annotation.Target;
  * @created 2016-01-13
  * @since 1.0
  */
+@SuppressWarnings("SameReturnValue")
 @Retention(RetentionPolicy.SOURCE)
 @Target(ElementType.TYPE)
 public @interface Version {

src/main/java/net/thauvin/erik/semver/VersionProcessor.java

@@ -38,12 +38,7 @@ import com.github.mustachejava.MustacheFactory;
 import com.github.mustachejava.MustacheNotFoundException;
 import edu.umd.cs.findbugs.annotations.SuppressFBWarnings;
 
-import javax.annotation.processing.AbstractProcessor;
+import javax.annotation.processing.*;
-import javax.annotation.processing.Filer;
-import javax.annotation.processing.Messager;
-import javax.annotation.processing.ProcessingEnvironment;
-import javax.annotation.processing.RoundEnvironment;
-import javax.annotation.processing.SupportedOptions;
 import javax.lang.model.SourceVersion;
 import javax.lang.model.element.Element;
 import javax.lang.model.element.ElementKind;
@@ -51,12 +46,7 @@ import javax.lang.model.element.PackageElement;
 import javax.lang.model.element.TypeElement;
 import javax.tools.Diagnostic;
 import javax.tools.FileObject;
-import java.io.File;
+import java.io.*;
-import java.io.FileNotFoundException;
-import java.io.IOException;
-import java.io.InputStreamReader;
-import java.io.OutputStreamWriter;
-import java.io.Writer;
 import java.nio.charset.StandardCharsets;
 import java.nio.file.Files;
 import java.util.HashSet;
@@ -70,7 +60,7 @@ import java.util.Set;
  * @created 2016-01-13
  * @since 1.0
  */
-@SuppressWarnings({ "PMD.GuardLogStatement", "PMD.BeanMembersShouldSerialize"})
+@SuppressWarnings({"PMD.GuardLogStatement", "PMD.BeanMembersShouldSerialize"})
 @SupportedOptions({Constants.KAPT_KOTLIN_GENERATED_OPTION_NAME, Constants.SEMVER_PROJECT_DIR_ARG})
 public class VersionProcessor extends AbstractProcessor {
     private Filer filer;

src/test/java/net/thauvin/erik/semver/VersionTest.java

@@ -41,7 +41,7 @@ import java.lang.annotation.Annotation;
  * @created 2019-04-02
  * @since 1.2.0
  */
-@SuppressWarnings({"ClassExplicitlyAnnotation"})
+@SuppressWarnings({"ClassExplicitlyAnnotation", "SameReturnValue"})
 class VersionTest implements Version {
     @Override
     public Class<? extends Annotation> annotationType() {