Fix Javadoc API generation warnings and errors

base/src/main/java/de/staropensource/sosengine/base/implementable/EventListenerCode.java

@@ -41,10 +41,18 @@ public abstract class EventListenerCode {
      */
     public @NotNull EventPriority priority = EventPriority.DEFAULT;
 
+    /**
+     * Constructs this class.
+     *
+     * @since v1-alpha5
+     */
+    public EventListenerCode() {}
+
     /**
      * Invokes the event listener.
      *
      * @param arguments arguments passed along by the event
+     * @throws Exception exceptions thrown
      * @since v1-alpha5
      */
     public abstract void run(Object... arguments) throws Exception;

base/src/main/java/de/staropensource/sosengine/base/internal/implementation/EventListenerMethod.java

@@ -44,6 +44,7 @@ public final class EventListenerMethod extends EventListenerCode {
     /**
      * Constructs this class.
      *
+     * @param method method to execute
      * @since v1-alpha0
      */
     public EventListenerMethod(@NotNull Method method) {
@@ -60,6 +61,7 @@ public final class EventListenerMethod extends EventListenerCode {
      * Forwards {@link ReflectionMethod#getAnnotation(Class)}
      * to the internal {@link ReflectionMethod} instance.
      *
+     * @param <T> annotation
      * @param annotation annotation to get
      * @return annotation or {@code null} on error
      * @see ReflectionMethod#getAnnotation(Class)

base/src/main/java/de/staropensource/sosengine/base/type/Tristate.java

@@ -52,6 +52,7 @@ public enum Tristate {
     /**
      * Converts the {@link Boolean} into a {@link Tristate}.
      *
+     * @param bool boolean to convert
      * @return tristated boolean
      * @since v1-alpha5
      */