Clarify availability of AbstractEnforcerRule

Improve links to javadoc

Fix some typos

enforcer-api/src/main/java/org/apache/maven/enforcer/rule/api/AbstractEnforcerRule.java

@@ -25,7 +25,7 @@
  * <a href="https://maven.apache.org/enforcer/enforcer-api/writing-a-custom-rule.html">Writing a custom rule</a>
  *
  * @author Slawomir Jaranowski
- * @since 3.2.0
+ * @since 3.2.1
  */
 public abstract class AbstractEnforcerRule extends AbstractEnforcerRuleBase {
 

enforcer-api/src/main/java/org/apache/maven/enforcer/rule/api/AbstractEnforcerRuleBase.java

@@ -24,7 +24,7 @@
  * Used for internal purpose.
  *
  * @author Slawomir Jaranowski
- * @since 3.2.0
+ * @since 3.2.1
  */
 abstract class AbstractEnforcerRuleBase implements EnforcerRuleBase {
 

enforcer-api/src/main/java/org/apache/maven/enforcer/rule/api/AbstractEnforcerRuleConfigProvider.java

@@ -26,7 +26,7 @@
  * Provided configuration will be added to current rules list by {@code Enforcer Mojo}
  *
  * @author Slawomir Jaranowski
- * @since 3.2.0
+ * @since 3.2.1
  */
 public abstract class AbstractEnforcerRuleConfigProvider extends AbstractEnforcerRuleBase {
 

enforcer-api/src/main/java/org/apache/maven/enforcer/rule/api/EnforcerLogger.java

@@ -24,7 +24,7 @@
  * Logger used by enforcer rule.
  *
  * @author Slawomir Jaranowski
- * @since 3.2.0
+ * @since 3.2.1
  */
 public interface EnforcerLogger {
 

enforcer-api/src/main/java/org/apache/maven/enforcer/rule/api/EnforcerRuleBase.java

@@ -24,7 +24,7 @@
  * Used for internal purpose.
  *
  * @author Slawomir Jaranowski
- * @since 3.2.0
+ * @since 3.2.1
  */
 public interface EnforcerRuleBase {
 

enforcer-api/src/main/java/org/apache/maven/enforcer/rule/api/EnforcerRuleError.java

@@ -25,7 +25,7 @@
  * This exception break a build immediate.
  *
  * @author Slawomir Jaranowski
- * @since 3.2.0
+ * @since 3.2.1
  */
 public class EnforcerRuleError extends EnforcerRuleException {
 

enforcer-api/src/site/apt/writing-a-custom-rule.apt.vm

@@ -49,7 +49,7 @@ Writing a custom rule
 
 * Implementation of custom Enforcer Rule
 
-  The rule must extends the {{{./apidocs/index.html}AbstractEnforcerRule}} and implements <<<execute>>> method.
+  The rule must extend {{{./apidocs/org/apache/maven/enforcer/rule/api/AbstractEnforcerRule.html}AbstractEnforcerRule}} (available since API version 3.2.1) and implement its <<<execute>>> method.
 
   Add annotation <<<@Named("yourRuleName")>>> to your Rule class. Your Rule name must start with lowercase character.
 
@@ -58,7 +58,7 @@ Writing a custom rule
   Maven component can be injected into Rule by annotation <<<@Inject>>> on field or constructor.
 
   Entry point for Rule executing is <<<execute>>> method, tf the rule succeeds, it should just simply return.
-  If the rule fails, it should throw an {{{./apidocs/index.html}EnforcerRuleException}} with a descriptive message telling the user why the rule failed.
+  If the rule fails, it should throw an {{{./apidocs/org/apache/maven/enforcer/rule/api/EnforcerRuleException.html}EnforcerRuleException}} with a descriptive message telling the user why the rule failed.
   Enforcer plugin takes decision based on configuration and Enforcer Rule level whether build should pass or fail.
   In case when you want to brake build immediately, <<<execute>>> method can throw an {{{./apidocs/index.html}EnforcerRuleError}}.