Need Help to Solve Extension Error

i’m getting this error how to solve this.
please correct me

[mkdir] Created dir: /home/Makeroid/appinventor/components/build/classes/AndroidRuntime
[javac] Compiling 362 source files to /home/Makeroid/appinventor/components/build/classes/AndroidRuntime
[javac] warning: [options] bootstrap class path not set in conjunction with -source 1.7
[javac] /home/Makeroid/appinventor/components/src/com/google/appinventor/components/runtime/ error: reached end of file while parsing
[javac] }
[javac] ^
[javac] 1 error
[javac] 1 warning

Balance out the braces.

sorry i’m new to IDE
please can u explain what to do