Merge pull request magento#1247 from SilinMykola/1239-string-index-out-of-bounds-exception

1239: bugfix Index out of range

Author: VitaliyBoyko

src/com/magento/idea/magento2uct/versioning/VersionStateManager.java

@@ -227,7 +227,8 @@ private void compute(final VersionStateIndex index) {
      */
     private String escapeFqn(final @NotNull String fqn) {
         return MagentoTypeEscapeUtil.escape(
-                fqn.trim().charAt(0) == '\\' ? fqn.trim() : '\\' + fqn.trim()
+                !fqn.trim().isEmpty() && fqn.trim().charAt(0)
+                        == '\\' ? fqn.trim() : '\\' + fqn.trim()
         );
     }
 }