Add private ctors to static utility classes
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Key: LUCENE-2733
URL: https://issues.apache.org/jira/browse/LUCENE-2733
Project: Lucene - Java
Issue Type: Task
Reporter: Uwe Schindler
Fix For: 3.1, 4.0
During development in 3.x and trunk we added some new classes like IOUtils and
CodecUtils that are only providing static methods, but have no ctor at all.
This adds the default empty public ctor, which is wrong, the classes should
never be instantiated.
We should add private dummy ctors to prevent creating instances.
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