1: Create error package with EsaException object

src/main/java/com/bartek/esa/error/EsaException.java

@@ -0,0 +1,20 @@
+package com.bartek.esa.error;
+
+public class EsaException extends RuntimeException {
+
+    public EsaException() {
+        super();
+    }
+
+    public EsaException(String message) {
+        super(message);
+    }
+
+    public EsaException(String message, Throwable cause) {
+        super(message, cause);
+    }
+
+    public EsaException(Throwable cause) {
+        super(cause);
+    }
+}