<plugin>
\t\t\t\t<groupId>org.apache.maven.plugins</groupId>
\t\t\t\t<artifactId>maven-compiler-plugin</artifactId>
\t\t\t\t<version>3.0</version>
\t\t\t\t<configuration>
\t\t\t\t\t<source>1.7</source>
\t\t\t\t\t<target>1.7</target>
\t\t\t\t\t<compilerArgument>-Xlint:all</compilerArgument>
\t\t\t\t\t<showWarnings>true</showWarnings>
\t\t\t\t\t<showDeprecation>true</showDeprecation>
\t\t\t\t</configuration>
\t\t\t</plugin>

이부분을 맞게 수정한다.