java: Make package private classes final

Aside from being good practice, extensibility if not designed for should
be prohibited, this will help isolate some of the effects of #445.

Author: mpkorstanje

java/gherkin-java.razor

@@ -43,7 +43,7 @@ import static java.util.Arrays.asList;
  * <p>
  * Changes to this class will be lost if the code is regenerated.
  */
-class @Model.ParserClassName<T> {
+final class @Model.ParserClassName<T> {
     enum TokenType {
         None(RuleType.None),
         @foreach(var rule in Model.RuleSet.TokenRules)
@@ -67,7 +67,7 @@ class @Model.ParserClassName<T> {
 
     private final Builder<T> builder;
 
-    static class ParserContext {
+    static final class ParserContext {
         final TokenScanner tokenScanner;
         final TokenMatcher tokenMatcher;
         final Queue<Token> tokenQueue;

java/src/main/java/io/cucumber/gherkin/AstNode.java

@@ -10,7 +10,7 @@
 import static io.cucumber.gherkin.Parser.TokenType;
 import static java.util.Objects.requireNonNull;
 
-class AstNode {
+final class AstNode {
     // subItems is relatively sparse, so pre-initializing all values with empty
     // lists is not efficient
     private final Map<RuleType, List<Object>> subItems = new EnumMap<>(RuleType.class);

java/src/main/java/io/cucumber/gherkin/EncodingParser.java

@@ -13,7 +13,7 @@
 /**
  * Parser for the {@code # encoding: <encoding> } pragma.
  */
-class EncodingParser {
+final class EncodingParser {
     private static final byte[] UTF_BOM_BYTES = "\uFEFF".getBytes(UTF_8);
     private static final Pattern COMMENT_OR_EMPTY_LINE_PATTERN = Pattern.compile("^\\s*#|^\\s*$");
     private static final Pattern ENCODING_PATTERN = Pattern.compile("^\\s*#\\s*encoding\\s*:\\s*([0-9a-zA-Z\\-]+)",

java/src/main/java/io/cucumber/gherkin/GherkinDocumentBuilder.java

@@ -29,7 +29,7 @@
 import static io.cucumber.gherkin.Parser.RuleType;
 import static io.cucumber.gherkin.Parser.TokenType;
 
-class GherkinDocumentBuilder implements Builder<GherkinDocument> {
+final class GherkinDocumentBuilder implements Builder<GherkinDocument> {
     private final List<Comment> comments = new ArrayList<>();
     private final IdGenerator idGenerator;
     private String uri;

java/src/main/java/io/cucumber/gherkin/GherkinException.java

@@ -1,6 +1,6 @@
 package io.cucumber.gherkin;
 
-class GherkinException extends RuntimeException {
+final class GherkinException extends RuntimeException {
     GherkinException(String message, Throwable cause) {
         super(message, cause);
     }

java/src/main/java/io/cucumber/gherkin/GherkinLine.java

@@ -4,7 +4,7 @@
 import static io.cucumber.gherkin.StringUtils.trimAndIndent;
 import static java.util.Objects.requireNonNull;
 
-class GherkinLine {
+final class GherkinLine {
 
     /**
      * The line text, including all leading and trailing whitespace characters.

java/src/main/java/io/cucumber/gherkin/GherkinLineSpan.java

@@ -1,6 +1,6 @@
 package io.cucumber.gherkin;
 
-class GherkinLineSpan {
+final class GherkinLineSpan {
     /**
      * Index-1 based position in codepoints.
       */ 

java/src/main/java/io/cucumber/gherkin/GherkinParser.java

@@ -43,7 +43,7 @@ public final class GherkinParser {
      */
     static final int FEATURE_FILE_AVERAGE_SIZE = FEATURE_FILE_AVERAGE_LINE_LENGTH * FEATURE_FILE_AVERAGE_LINE_COUNT;
 
-    public final static class Builder {
+    public static final class Builder {
         private boolean includeSource = true;
         private boolean includeGherkinDocument = true;
         private boolean includePickles = true;

java/src/main/java/io/cucumber/gherkin/GherkinTokenMatcher.java

@@ -17,7 +17,7 @@
 import static io.cucumber.gherkin.Locations.atColumn;
 import static io.cucumber.gherkin.Parser.TokenType;
 
-class GherkinTokenMatcher implements TokenMatcher {
+final class GherkinTokenMatcher implements TokenMatcher {
 
     private static final Pattern LANGUAGE_PATTERN = Pattern.compile("^#\\s*language\\s*:\\s*([a-zA-Z\\-_]+)\\s*$");
     private final GherkinDialectProvider dialectProvider;

java/src/main/java/io/cucumber/gherkin/InputStreams.java

@@ -4,7 +4,7 @@
 import java.io.IOException;
 import java.io.InputStream;
 
-class InputStreams {
+final class InputStreams {
 
     /**
      * Shim for InputStream.readAllBytes