Add missing javadocs

nflow-engine/src/main/java/com/nitorcreations/nflow/engine/workflow/definition/WorkflowSettings.java

@@ -7,19 +7,34 @@
 import static java.util.concurrent.TimeUnit.SECONDS;
 import static org.joda.time.DateTime.now;
 
+import java.math.BigInteger;
+
 import org.joda.time.DateTime;
 import org.springframework.core.env.Environment;
 
-import java.math.BigInteger;
-
 /**
  * Configuration for the workflow execution.
  */
 public class WorkflowSettings {
+  /**
+   * Minimum delay on execution retry after an error. Unit is milliseconds.
+   */
   public final int minErrorTransitionDelay;
+  /**
+   * Maximum delay on execution retry after an error. Unit is milliseconds.
+   */
   public final int maxErrorTransitionDelay;
+  /**
+   * Length of forced delay to break execution of a step that is considered to be busy looping. Unit is milliseconds.
+   */
   public final int shortTransitionDelay;
+  /**
+   * Immediate transition delay.
+   */
   public final int immediateTransitionDelay;
+  /**
+   * Maximum retry attempts.
+   */
   public final int maxRetries;
 
   WorkflowSettings(Builder builder) {
@@ -63,7 +78,7 @@ public Builder(Environment env) {
     }
 
     /**
-     * Set maximum error transition delay.
+     * Set the maximum delay on execution retry after an error.
      *
      * @param maxErrorTransitionDelay
      *          Delay in milliseconds.
@@ -75,7 +90,7 @@ public Builder setMaxErrorTransitionDelay(int maxErrorTransitionDelay) {
     }
 
     /**
-     * Set minimum error transition delay.
+     * Set the minimum delay on execution retry after an error.
      *
      * @param minErrorTransitionDelay
      *          Delay in milliseconds.
@@ -87,7 +102,7 @@ public Builder setMinErrorTransitionDelay(int minErrorTransitionDelay) {
     }
 
     /**
-     * Set short transition delay.
+     * Set the length of forced delay to break execution of a step that is considered to be busy looping.
      *
      * @param shortTransitionDelay
      *          Delay in milliseconds.

nflow-engine/src/main/java/com/nitorcreations/nflow/engine/workflow/executor/WorkflowExecutor.java

@@ -2,15 +2,50 @@
 
 import org.joda.time.DateTime;
 
+/**
+ * Describes one workflow executor.
+ */
 public class WorkflowExecutor {
+  /**
+   * Unique identifier of executor instance. Each time an executor is started it receives a new identifier.
+   */
   public final int id;
+  /**
+   * The host name of the executor.
+   */
   public final String host;
+  /**
+   * Process id of the executor.
+   */
   public final int pid;
+  /**
+   * The executor group of the executor.
+   */
   public final String executorGroup;
+  /**
+   * Time when the executor was started.
+   */
   public final DateTime started;
+  /**
+   * Time when the executor last updated that it is active.
+   */
   public final DateTime active;
+  /**
+   * Time after which the executor is considered dead.
+   */
   public final DateTime expires;
 
+  /**
+   * Creates a new workflow executor description.
+   *
+   * @param id Unique identifier of executor instance
+   * @param host The host name of the executor
+   * @param pid Process id of the executor
+   * @param executorGroup The executor group of the executor
+   * @param started Time when the executor was started
+   * @param active Time when the executor last updated that it is active
+   * @param expires Time after which the executor is considered dead
+   */
   public WorkflowExecutor(int id, String host, int pid, String executorGroup, DateTime started, DateTime active, DateTime expires) {
     this.id = id;
     this.host = host;