Refactor persistence library.

Added a persistence speficication cluster and implementation cluser,
Implementation MySQL.
Added test cases for mysql implementation.

persistence/implementation/mysql/scripts/Readme.txt

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+Added Stored Procedures

persistence/implementation/mysql/scripts/create_database.sql

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+SET @OLD_UNIQUE_CHECKS=@@UNIQUE_CHECKS, UNIQUE_CHECKS=0;
+SET @OLD_FOREIGN_KEY_CHECKS=@@FOREIGN_KEY_CHECKS, FOREIGN_KEY_CHECKS=0;
+SET @OLD_SQL_MODE=@@SQL_MODE, SQL_MODE='TRADITIONAL,ALLOW_INVALID_DATES';
+
+-- -----------------------------------------------------
+-- Schema cms
+-- -----------------------------------------------------
+CREATE SCHEMA IF NOT EXISTS `cms` DEFAULT CHARACTER SET latin1 ;
+USE `cms` ;
+
+-- -----------------------------------------------------
+-- Table `cms`.`nodes`
+-- -----------------------------------------------------
+CREATE TABLE IF NOT EXISTS `cms`.`nodes` (
+  `id` INT(10) UNSIGNED NOT NULL AUTO_INCREMENT,
+  `publication_date` DATE NOT NULL,
+  `creation_date` DATE NOT NULL,
+  `modification_date` DATE NOT NULL,
+  `title` VARCHAR(255) NOT NULL,
+  `summary` TEXT NOT NULL,
+  `content` MEDIUMTEXT NOT NULL,
+  PRIMARY KEY (`id`))
+ENGINE = InnoDB
+AUTO_INCREMENT = 1
+DEFAULT CHARACTER SET = latin1;
+
+
+-- -----------------------------------------------------
+-- Table `cms`.`roles`
+-- -----------------------------------------------------
+CREATE TABLE IF NOT EXISTS `cms`.`roles` (
+  `id` INT(10) UNSIGNED NOT NULL AUTO_INCREMENT,
+  `role` VARCHAR(100) NOT NULL,
+  PRIMARY KEY (`id`),
+  UNIQUE INDEX `role` (`role` ASC))
+ENGINE = InnoDB
+AUTO_INCREMENT = 1
+DEFAULT CHARACTER SET = latin1;
+
+
+-- -----------------------------------------------------
+-- Table `cms`.`users`
+-- -----------------------------------------------------
+CREATE TABLE IF NOT EXISTS `cms`.`users` (
+  `id` INT(10) UNSIGNED NOT NULL AUTO_INCREMENT,
+  `username` VARCHAR(100) NOT NULL,
+  `password` VARCHAR(100) NOT NULL,
+  `salt` VARCHAR(100) NOT NULL,
+  `email` VARCHAR(250) NOT NULL,
+  PRIMARY KEY (`id`),
+  UNIQUE INDEX `username` (`username` ASC))
+ENGINE = InnoDB
+AUTO_INCREMENT = 1
+DEFAULT CHARACTER SET = latin1;
+
+
+-- -----------------------------------------------------
+-- Table `cms`.`users_nodes`
+-- -----------------------------------------------------
+CREATE TABLE IF NOT EXISTS `cms`.`users_nodes` (
+  `users_id` INT(10) UNSIGNED NOT NULL,
+  `nodes_id` INT(10) UNSIGNED NOT NULL,
+  PRIMARY KEY (`users_id`, `nodes_id`),
+  INDEX `fk_users_has_nodes_nodes1_idx` (`nodes_id` ASC),
+  INDEX `fk_users_has_nodes_users_idx` (`users_id` ASC),
+  CONSTRAINT `fk_users_has_nodes_nodes1`
+    FOREIGN KEY (`nodes_id`)
+    REFERENCES `cms`.`nodes` (`id`)
+    ON DELETE NO ACTION
+    ON UPDATE NO ACTION,
+  CONSTRAINT `fk_users_has_nodes_users`
+    FOREIGN KEY (`users_id`)
+    REFERENCES `cms`.`users` (`id`)
+    ON DELETE NO ACTION
+    ON UPDATE NO ACTION)
+ENGINE = InnoDB
+DEFAULT CHARACTER SET = latin1;
+
+
+-- -----------------------------------------------------
+-- Table `cms`.`users_roles`
+-- -----------------------------------------------------
+CREATE TABLE IF NOT EXISTS `cms`.`users_roles` (
+  `users_id` INT(10) UNSIGNED NOT NULL,
+  `roles_id` INT(10) UNSIGNED NOT NULL,
+  PRIMARY KEY (`users_id`, `roles_id`),
+  INDEX `fk_users_has_roles_roles1_idx` (`roles_id` ASC),
+  INDEX `fk_users_has_roles_users1_idx` (`users_id` ASC),
+  CONSTRAINT `fk_users_has_roles_roles1`
+    FOREIGN KEY (`roles_id`)
+    REFERENCES `cms`.`roles` (`id`)
+    ON DELETE NO ACTION
+    ON UPDATE NO ACTION,
+  CONSTRAINT `fk_users_has_roles_users1`
+    FOREIGN KEY (`users_id`)
+    REFERENCES `cms`.`users` (`id`)
+    ON DELETE NO ACTION
+    ON UPDATE NO ACTION)
+ENGINE = InnoDB
+DEFAULT CHARACTER SET = latin1;
+
+
+SET SQL_MODE=@OLD_SQL_MODE;
+SET FOREIGN_KEY_CHECKS=@OLD_FOREIGN_KEY_CHECKS;
+SET UNIQUE_CHECKS=@OLD_UNIQUE_CHECKS;

persistence/implementation/mysql/scripts/tables.sql

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+DROP TABLE IF EXISTS nodes;
+
+CREATE TABLE nodes
+(
+	id smallint unsigned NOT NULL auto_increment,
+	publication_date date NOT NULL,  #When the article was published
+	creation_date  date  NOT NULL, #When the article was created
+	modification_date  date  NOT NULL, #When the article was updated
+	title varchar(255) NOT NULL, #Full title of the article
+	summary text NOT NULL, #A short summary of the articule
+	content mediumtext NOT NULL,  #The HTML content of the article
+
+	PRIMARY KEY (ID)
+);