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[alexyush]

No description provided.

[IharYudziankou]

What must be refactored

• Never throw NullPointerException. More than, never catch it. Any null check should be processed manually or using e.g. Guava libraries
• Use Logger, e.g. Slf4j
• Move static resources to *.properties files (e.g. URL)
• Avoid using System.out.println(). See bullet about Logger

What is better to refactor

• Add javadocs. It makes easy to understand logic
• Extract version of dependencies to properties in pom.xml
• Use else-if instead of sequence of if
• In classes firstly should be declared fields, then constructors, then public methods, then private. It is sometimes allowed to mix private and public methods, but common way is as described.
• Do you really need empty default constructors ?
• Add final modificator to method's parameters and local variables
• Java 7 allows multiple exception handling in catch blok
• Avoid 'Magic Numbers'

What possibly can be updated (Colleagues please correct me if I were wrong)

• Use the same pattern of parameters naming (e.g. record and rec in RecordDao)
• Prefer foreach instead while and Iterator

[UladzimirKapylou]

Are you sure that builds complete successfully?