Work on #190: Add first batch of automagically generated puml files

thread-pool/etc/thread-pool.urm.puml

@@ -0,0 +1,35 @@
+@startuml
+package com.iluwatar.threadpool {
+  class Worker {
+    - task : Task
+    + Worker(task : Task)
+    + run()
+  }
+  class App {
+    + App()
+    + main(args : String[]) {static}
+  }
+  abstract class Task {
+    - ID_GENERATOR : AtomicInteger {static}
+    - id : int
+    - timeMs : int
+    + Task(timeMs : int)
+    + getId() : int
+    + getTimeMs() : int
+    + toString() : String
+  }
+  class PotatoPeelingTask {
+    - TIME_PER_POTATO : int {static}
+    + PotatoPeelingTask(numPotatoes : int)
+    + toString() : String
+  }
+  class CoffeeMakingTask {
+    - TIME_PER_CUP : int {static}
+    + CoffeeMakingTask(numCups : int)
+    + toString() : String
+  }
+}
+Worker -->  "-task" Task
+PotatoPeelingTask --|> Task 
+CoffeeMakingTask --|> Task 
+@enduml